Mr. Yue (Anthony Wong) is an ex Secret Service Officer living out the quiet life as a chiropractor in a back street clinic. When he relives his colourful past through tall-tales of fighting ninjas, ten-on-one face-offs and top secret missions, his kids think he's a delusional double-O loser! Yet when a shadowy villain from his past re-appears, his license to thrill is dusted down and the high-kicking, crazy action begins. But when he is outnumbered and taken prisoner, it's down to the teenage tear aways to dodge assassins, wheel-chair bound maniacs and kung fu prodigies. Have they inherited their dad's crazed action instincts or will this be the final chapter in his great adventures?