Teenage Mutant Ninja Turtles: They're not the only ones

During the dark of the night, four sisters walk through the dark alley ways of New York city;Venus, Larota, Talena and Amoly. as the night sky lights up, its starts to rain containers of glowing goop. as one crashes before the four, they are transformed into something else, turtles. they are taken in by a mutant rat; Master Samoru, she teaches the way of ninjitsu to them to protect the streets of New York. A year has passed since they have found any trouble, all they have found were robbers and bandits. but as they celebrate their victory, one of the turtles is missing, Amoly.
As Amoly skates through the city, she meets an unlikely friend that changes both the groups of the Teenage Mutant Ninja Turtles lives.