Teenage Mutant Ninja Turtles: Mutagen Chains

AU story for the Teenage Mutant Ninja Turtles. Fate has a funny way of interfering with people's lives. See how fate plays out for a group of brothers, a lab assistant, a vigilante who attracts trouble, a girl seeking to escape the past, and the evil forces at work to destroy them. What happens when fate brings them together? Rated T but may change later on.