Don't mess with the daughter of Kevin Ryan. (Rated T for minor swearing and my own paranoia; Daddy!Ryan; Kevin Ryan is a great father; no slash)

He is alone in the dojo, save for Leonardo. A rare quiet evening, Michelangelo and Master Splinter both having gone to visit April and Casey. But quiet nights never do seem to last. 'Kill him. It would be so easy,' the voice taunts in a whisper. 'Your blade is in your hand. Stab him. Quickly, before he turns around. Kill him.' [art by Sneefee; to be continued] "What have I done?"

The story Tony told the children about their parents at the beginning of the movie.