Back at the Bourgeois residence Adrien and Lila wanted to celebrate their decision to sail away together. Everyone laughed and danced, Lila kept clinging to Adrien who was completely zoned out. While Andre was thrilled that Adrien was finally going to settle down, but Chloe was infuriated.

"Adrien I can't believe you're going off with her!" Chole cried.

"I love her Chloe. No one else holds my heart."

"Exactly so beat it blondie!" Lila said.

"Adrien you hardly know this girl!"

"Chloe I will hear no more of this."

Chloe scoffed but walked away. Meanwhile Marinette sat by the balcony crying her heart out. She had never know sadness like this it was more painful than anything she had ever felt. To make matters worse tomorrow was the night she would die and become nothing more than sea foam. But it wasn't death that made her sad it was the fact that she would never see Adrien again and he probably wouldn't care. Her tears dripped off her face and into the sea.

"I thought he loved me." She sobbed.

Plagg walked next to her and nuzzled her comfortingly. She stroked him and tried to smile but it was too hard. Then her mermaid friends appeared from the surface with tearful looks in their eyes.

"Oh my friends I will miss you so much."

"Marinette we went to see Trixx." Alya said. "And we found a way to save you."

"How?"

"You must kill him."

"What?!"

Alya handed her a dagger.

"Pierce his heart before the moon rises tomorrow night." She said.

"When his blood lands on your feet you'll be a mermaid again." Juleka said. "Let him die your place."

"And come back to us." Rose added.

"I... I can't." Marinette said. "I love him."

"But he doesn't love you. It'll be short and quick."

"I can't do it!" She said to her friends.

"But you'll die if you don't." Mylene said.

"I don't care. I could never hurt him even to save my life."

"Why? Why die for him?" Alya asked.

"Because I love him." She said. "I love him more than life itself."

Tikki and Plagg both nuzzled her comfortingly.

"I love you all so much." She wept. "And I'll miss you dearly."

Plagg and Tikki just couldn't believe any of this. They decided to go try and talked to Adrien though he might be a little surprised after learning they are capable of speech. They decided to wait til he was alone because they didn't want to freak out people. As they watched Adrien and Lila dancing they noticed how strange Adrien's eyes looked and how Lila's necklace was always glowing.

"Did you see the kid's eyes?" Plagg asked Tikki. "They were all foggy and confused like he had no idea what was happening."

"Yes and look at Lila's necklace. It's glowing."

"I smell a rat. Let's get a better look."

They flew and crawl toward her.

"Shoo! You filthy things!" She said swatting at them away.

"How rude." Tikki whispered.

"That's it! I've had it!" Plagg pulled a whistle out.

"Where did you get that?"

"Rose gave it to me. She said in would help. Pay back time."

He blew the whistle. Out of no where a flock of birds and Sea gulls swooped down on to Lila and began pulling on her hair. Crabs and lobsters climbing up and began pinching her while fish, dolphins, and seals spat in her face.

"Get away from me! You slimy little-"

"Should we help her?" Alix asked.

"Why? This is funny." Nino snickered.

"Daddy don't let the sea gulls poop in my hair!" Chloe cried.

"Here now! What is the meaning of this!" Andre demanded.

But instead of an answer Plagg ran right up to Lila and scratched her leg.

"Ow!"

"Ha! I told you I wouldn't forget! Vengeance is mine!"

"Oh why you little!" She grabbed the little black cat and began to strangle him. But quickly relased him when she saw how everyone was looking at her.

"Adrien, help me." She said. "I'm frightened."

"Plagg! Bad cat! Get away from her!" Adrien said pulling him off her. "I can't believe you would do this! Why would you do that to the woman I love?"

He and his crew shooed the animals away.

"There! Come on Lila let me help you."

"Miss Rossi I do apologise." Andre said. "Gorilla get rid of this cat."

"With pleasure." Gorilla said grabbing Plagg by the back of his neck. Plagg gulped and looked at Adrien with pleading eyes but the young man only went along with Lila.

Adrien was about to leave when he heard a beautiful voice singing. It sent his head in a world and he found himself slipping away from Lila, through the crowd, and followed the fair voice outside to the balcony. The source of that voice was that girl he had seen earlier, what was her name again? Marinette. She sat on the edge of the balcony gazing at the evening sky and the crashing tides waiting for the moon clutching a knife in her hand.

Note: Now she sings the second part of the song.

"Though my heart has dissolved into the sea.

My voice is still echoing I love you.

Let the fragments be scattered on the ocean's breeze.

My voice will keep on blessing you."

That voice it was so beautiful but so sad. He watched her throw down the knife and stand on the edge of the balcony. What was she doing?

"How could I be so blind? I should've known better.

Now your heart belongs to another person.

I can't even scream, to let the world know my tragedy.

But then you wouldn't hear me.

Singing, singing, at the bottom of the sea.

Letting my heart strings shape into a song.

Even if my voice is too quiet to hear.

I'll never stop singing that echo."

Her voice softened his heart and brought tears to his eyes. He knew that voice, he knew that girl, Marinette. His lady, his princess, he remembered. He smiled at her but then turned confused. Why did she look so weak? What was happening to her?

"Though my heart has dissolved into the sea.

My voice is still echoing I love you.

Let the fragments be scattered on the ocean's breeze.

My voice will keep on blessing you.

La, la, la."

When her song finished she closed her eyes and took a deep breath. She was going to jump into the sea and turn to foam at moon rise. Her foot moved away from the edge to begin her plunge forward.

"Marinette no!" She heard a familiar voice shout. "Marinette what are you doing up there? Come down before you fall!"

She turned around with tears in her eyes then shook her head and turned back to the sea. She looked like she was on the verge of collapsing. She started to faint and fall off the edge toward the sea but Adrien rushed to catch her. He ran to Marinette with open arms that caught her. He then embraced her and cradled her. Adrien looked deeply into Marinette's eyes and became overwhelmed with emotion, his love for her returned completely.

"Marinette what's wrong?" He asked.

But she could not answer, she was too weak, she could only gaze at him as her eyes fluttered close. He noticed that her body felt so cold and light almost like air.

"Marinette? Why are you so cold?"

But she didn't respond.

"Marinette? Marinette!" Her body seemed to fading.

"What's happening to her?"

"She's dying." Alya said. "You gave your love to another woman now Marinette must turn to the sea foam when the moon rises."

"What!? No! She can't! Marinette! No! Marinette! Stay with me! Please! Forgive me Marinette! Forgive me! I beg you, please don't leave me!" He found himself starting cry as he felt the woman he loved slipping away from him. He turned to the mermaids. "Can't you do something?"

"We can't! She can only be saved if you are killed by that knife!" Alya said. "But she wouldn't kill you. She couldn't."

He looked at the knife and then back at the fading Marinette.

"Then I'll do it!" Adrien declared.

He grabbed the knife from the floor and just as the moon was beginning to rise Adrien stabbed himself right in the heart. He fell next to Marinette with a bleeding chest. His blood spilled on to Marinette's transparent feet. The mermaids were all so horrified but what had happened that they couldn't speak they could only watch as Marinette's body disappeared while Adrien began bleeding to death.