After suffering life changing injuries in the line of duty, bomb disposal officer Fung turns his back on the police. But when a devastating series of bombings sweep Hong Kong, the police suspect their former ally may be involved after he is found unconscious at a crime scene. Now faced with memory loss and recalling only fragments of his former life, Fung sets out to uncover the truth and find out who he really is.

When a terrorist who specializes in explosives takes hold of an underground tunnel, he threatens to kill hostages if his demands are not met.

What dreams and passions do we want to live out, and when did they slip away in the ordinariness of life? The immense popularity of mini4WD reaches across all generations including a primary school student, a middle-aged father nonchalant about everything in life, and a mini4WD superhero who refuses to reveal his true identity. The popularity may recede but the lesson learned never disappeared: it is chasing after the passion instead of winning that matters. Entertainer Bob Lam gives a winning performance as the kidult with the cherubic face who is scorned in various extents by his boss, wife and 5-year old daughter. Discovering his passion for mini4WD again, his life speeds up in more ways than one.