"Old Hob, Slash, and their crew are a force to be reckoned with, and when someone close to the group is kidnapped, the mutanimals end up on an adventure more wild and dangerous than they could ever have imagined. Then, the turtles return from Burnow Island to find unimaginable tragedy. As the family struggles to cope, an enraged foot clan prepares its revenge. Meanwhile, Casey prepares for a final showdown with Hun as the purple dragons run amok,...