Years after retiring from their formidable ninja lives, a dysfunctional family must return to shadowy missions to counteract a string of looming threats.

On a massive luxury cruise ship while at sea, the loyal butler and a mysterious woman cross paths as they try to uncover a murder-mystery that occurs on the ship.

Action actor Tateishi Daisuke who struggles with loneliness after suffering a traumatic experience due to an accident during filming. One day, he comes across a senior high school girl Ayumi…