Mutant turtles? Check! Mutant rat? Check again! Mermaid? Ch... Wait, what?!?! The TMNT discover a large oyster in Stockman's Lair. When they open it, they realize why it was so heavy: a mermaid was locked inside! Join the brothers in an adventure filled with mystery, forgotten pasts, and an evil curse in TMNT: Mermaid's Curse!