17 years after Hamato Splinter's death, the four turtles are estranged and living apart. At Shadow Jones' Private School, Shadow and friend Davianna Wallace are horrified to discover a new mutant turtle sitting in the mutilated blood and remains of their childhood friend Augustus Amherst. Shadow fiercely subdues the turtle, which is taken into police custody, and Shadow calls home to her 34-year-old Uncle Michelangelo Hamato to tell him the grisly news. Mikey calls his brother, the antisocial scientist Donatello Hamato, telling him to stay clear of the new mutant and to relay the same message to their brother, the ninja hermit Raphael Hamato, whom Mikey has cut all ties with years ago. But Raph defies Mikey's wishes and recruits Donnie in breaking the mysterious mutant out of custody so th