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

Tanaka has won a world-renowned advertising award. His old friend Yusaku comes to his company for a job interview, and submits a drawing that looks like Tanaka’s award-winning work, which plunges the company into panic. To resolve the situation, Tanaka visits Yusaku’s house....

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