A whole new world is born, a world where more mutants live together than ever before. Life is not easier and many complications are returning to New York City! The consequences of the mutagenic bomb launched by Old Hob continue to affect New York in an increasingly worrying way. As the government strives to deal with a humanitarian crisis, mutants are beginning to disappear. Turtles are looking for clues that lead them to the sea. It's when they discover something terrifying now is going on deep! Meanwhile, a dispute between Baxter and April broke out and could lead to disastrous consequences in the mutant neighbourhood, where existence is forever upset...