April was exhausted from all the investigating she had been doing for her friend Sunset. One night, she decided to go home and get some rest. She went to her apartment, and changed into her pajamas. She then went to bed, turning off the lights, and fell asleep. As April slept, she fell into a dream. In her dream, April was still in her pajamas, and she was walking in a forest, her bare feet touching the ground. "This feels peaceful..." April thought to herself, "Communicating with nature." Suddenly, a familiar sinister voice said, "Consider it a calm before the storm..." Out of the shadows came The Shredder! April gasped in horror, "Shredder?!?!?! No, you're dead! This is impossible!"

 "In the realm of dreams, nothing is impossible," replied Shredder, "especially in nightmares..." He then started to laugh evilly. April then ran as fast as she could, but found that no matter how hard she tried, it felt like she was running in slow motion. "Leaving so soon?" taunted Shredder, "the nightmare has only begun..." His eyes then turned red. He took off his helmet, his face looked like a werewolf with dark fur, his smile revealing razor sharp fangs. April stared in horror. "Why so scared?" taunted the boogeyman; its voice changing, "I haven't even revealed my true form yet." And just like that, his body transformed, having the upper torso and arms of a werewolf with dark fur, his big hands with razor sharp claws. The lower part of his body showed the legs of a spider, his legs a blood red.

 "What the hell are you?" April asked in horror, taking several steps back. The monstrosity followed her. "I've been called many things," it said, "a monster, a boogeyman, The Unmentionable... But you may call me, Dark Heart!!!!" April looked at Dark Heart, and realized, "Wait... You're the one that's been killing all those people in their sleep!" Dark Heart laughed evilly, "Right you are, Miss O'Neil. Such a shame that you won't live to tell Sunset Shimmer your conclusion of who killed all those pathetic humans..." April then ran as fast as she could, but Dark Heart grabbed her foot, lifting her from the ground. April struggled, kicking his arm. But Dark Heart wasn't bothered, and lifted her right side up, his large arms grabbing ahold of her arms separately. Now April was face to face with him. "I'm not going to kill you yet," threatened Dark Heart, "you're going to play a big role for me. I want you to send a message to Sunny and her new turtle friends... But for now, you and I are going to have one hell of a time!" April then screamed in terror, for Dark Heart's nightmarish tortures were now beginning.