The last voyage of shipping magnate Onabes's bachelorhood is an extravagant affair, with a ship full of beautiful women and first-class objets d'art. Lupin, knowing that Onabes has a villainous past, decides to give him a shock, by disguising himself as a shipwrecked woman(?!), and thus getting aboard his ship... a plan which works fine up to that point, but what should happen then but that Onabes falls in love at first sight with Lupin in his female disguise, and proposes!! Will wedding bells ring out at the church?!