Once the pet rat of a ninja, Master Splinter witnessed the murder of his owner. Since then, he came into contact with a mysterious substance called Ooze, which mutated him into an anthropomorphic rat. Brimming with guiding wisdom, he became the ninja master to the Teenage Mutant Ninja Turtles, teaching them everything he knows about ninjutsu and honor. With the spirit of an old man and a body honed for the demands of ninja prowess, Splinter has been neglected his sexual side, which begs for release.