It's the turtles fifteenth birthday and they're itching to venture to the surface and showcase their ninja skills to Master Splinter reculantley agrees. At first, they love the surface with its weird lights and even stranger food (like pizza). However, things go awry when they witness a girl and her father being abducted by men in a van. They try to intervene, but don't fare well during the fight, with the van getting away, only to discover that the kidnappers are really robots with living brain creatures in there chest and were carrying ooze that made them into mutants. Eager more to learn about this strange connection, they regroup and begin to practice fighting as a team with Master Splinter appointing Leonardo as The Leader. After storming the enemy fortress. they learn that these creatures are called "The Kraang" and have sinister plans in store. They manage to rescue the girl, April, but the Kraang still have her father. They Vow not to rest until they rescue him.
