Becoming a pirate captain in a fantastical world was never in Ranma's life plans. But when magic strands him in the Grand Blue, he has no choice. With an impish wizard as a guide, Ryoga as his navigator, and a crew made of unwanted fiancees (plus Nabiki), Ranma sets out to find the One Piece and return to Nerima!

They say that even Buddha will forgive only three times. And when Akane reacts to Ranma saving her memory and life from Shampoo with her usual jealousy and violence, he finally has enough.

Switching the engagement might have been a miscalculation on Nabiki's part...

In a world that could have been, a very unusual Kasumi prepares for a romantic day out.

A chance encounter changes everything. When Ranma carries Nabiki away from the wrath of Ukyo and Shampoo in the wake of their new engagement, he inadvertently leads them all through a door that wasn't there yesterday - and isn't there when they look back! Now stranded in a City of Doors, the four reluctant allies must work together to overcome all obstacles to a path home.