A gang of amateur thieves decides to pull off their masterstroke. Aboard a luxury cruise ship, they attempt to rob it, but misunderstandings abound and all their plans are thwarted. Adding to the gang's entanglements are those of the bumbling captain, an enigmatic passenger, a meddlesome first officer, a gay couple, a feminist group, an unscrupulous cashier, an unusual married couple, and much more.