The Teenage Mutant Ninja Turtles and He-Man travel to one another's universes in the hopes of untangling the Knot in the cosmos. But despite plans to avoid jumbling realties, they find themselves drawn to each other's friends and allies. Meanwhile, timestress Renet has found herself in the past-smack-dab in the middle of the Foot Clan's training dojo-where a mysterious student may have something to do with all this trouble...