Killian's POV

Killian could feel all the emotions he had held back start to move through him into Ariel as he deepened their kiss. Then all of the sudden Ariel pulls away and mouths, "Goodbye Killian, I love you." Killian's heart drops as he feels an unseen force send him quickly through the water with enough force to completely toss his body out of the water. 

"Killian, where's Mary?" Dean calls out as he searches the surface for signs of Ariel. Rage fills his body as Killian climbs up the side of the ship and ignoring Dean and Sam's questions makes his way to his quarter's. "Hey, I'm talking to you!" Dean yells out as he follows after Killian anger filling his body.

Killian starts to rummage through his desk as Dean bursts through the door saying, "You just let that bitch take Mary, are you fucking kidding me?!" Killian clenches his as he opens the secret compartment that held Ariel's treasured possessions. "What we're you thinking?" Dean yells as he slams his hands on the desk. 

"I didn't have a choice! Do you think I'd really let the woman I love give herself up for me?" Killian yells as stares daggers at Dean. 

Dean's eyes widen as he says, "You love her? You barely know her!" 

Killian clears his throat as he says, "Actually mate I've known her longer then you have. Which is how I know this," He pulls a seashell out of the hidden compartment and holds it up as he says, "You know how in some seashells you can hear the ocean?"

"Everybody knows that," Dean says folding his arms over his chest. 

"Well in some the ocean can hear you, this just happens to one of those shells mate." Killian says as he pushes past Dean and makes his way to the ships railing and taking a deep breath blows into the shell. 

"Are you kidding me, walkie-talkie seashells?" Dean says as he walks up beside the pirate. 

"Just wait mate, he'll come." 

Dean's brow furrows as he says, "Who'll come?" Killian points toward the water as the sky grows dark; Lightning flashes as the wind picks up causing the sea to crash against the side of the ship.

Seconds later a man with a long white beard rises out of the water and says his voice deep as a baritone, "Where is she?" 

"Ursula has her, your majesty." Killian says as he clenches his jaw. 

"I see, thank you for notifying me." He says as he turns and starts to descend back into the sea. 

"King Triton wait!" Killian says causing the King of the Mere-people to freeze in his tracks. "We want to help you rescue her," 

"And why would humans want to help save a mermaid?" 

"Because we love her," A male voice says from behind Killian and Dean and they turn to see Eric standing a few feet away staring at them with knowing eyes.

"I see, you're the prince my daughter left home for, although you ended up marrying another and breaking my daughter's heart." 

Eric clenches his jaw as he says, "I realized after she left that I had made the wrong choice, but when I saw her again I knew I didn't want to lose her, even if she's married to another. I still want to be a part of her life." 

"Married?" Triton says as he narrows his eyes. "Whom is she married too?" Eric points to Killian and Triton's eyes widen with rage. "Is it true that you married my child?" 

Killian's heart clenches as he says, "She is not married to me although I would marry her in a heartbeat." 

"Then who is she married to?" Triton asks annoyance clear on his face. 

"She isn't married, but she is family and we all love her." Sam says as he walks up from below deck where he checked on Cas.

Triton looks back and forth between the two men before he says, "I see, which of you are from another realm?" 

Dean and Sam raise their hands before Dean says, "With all due respect could we get going we don't know how much longer Mary has." 

"Mary?" Triton says as he stares at him. 

"I'll explain later your majesty, for now please tell us what we can do?" Killian says as he grips the railing. 

"There is nothing you can do as humans, but perhaps you can help as Mermen."

 "What like a male version of a mermaid?" Dean says as he looks back and forth between his brother and King Triton. 

"I'm in," Sam says as he walks over to stand beside Killian.

"No Sammy you're staying here, I'll go." 

"Dean you can't tell me what to do not when it comes to Ariel, she's my sister and I'm going to protect her no matter what it costs."

 "No, I promised I'd keep you both safe and that's what I'm gonna do. You're staying here." 

"Dean you don't know what Ursula is capable of, I am. I've witnessed Ariel's memories I've seen how much Ursula wants her. I'm going and that's that." Sam says as he turns back toward King Triton and says, "I'll do anything to help save your daughter sir." 

"I agree, I'll help as well." Killian says cutting Dean off from continuing his argument.

 "I want to help," Eric says walking up to stand beside Sam giving him a slight nod.

"Dammit, I'm in too!" Dean says as he stands on Killian's other side. 

"Then please climb up onto the railing." Without hesitation the four men climb up onto the railing and await their next order. Triton lifts up his trident and the men stare wide eyed as a glowing gold light flows from the trident to their legs. Killian closes his eyes as he fills his mind with thoughts of Ariel. Seconds later he feels himself falling forward into the water. He opens his eyes when the coldness of the ocean starts to feel normal. He glances over to see Dean failing to grasp the idea of swimming with a tail instead of legs. 

"Come on this is ridiculous!" he says as he flicks his tail only to face plant to the sea floor. Killian smiles as he takes a deep breath and flicks his tail back and forth causing him to surge forward. He looks behind him to see Sam and Eric follow suit. 

"Now if you are ready let's go rescue my daughter." Triton says as he surges forward through the sea with Killian, Eric, Sam, and then Dean trailing behind him. Killian didn't know what they were going to do once they found Ariel but he didn't care all her knew was that he was going to rescue her even if it cost him his life.