Tong Ka-Ming (Jack Wu) is a police cadet who got expelled for hacking into the school system to change his friend's grade.

In order to join the police force again, Chong Chin-Pang (Eddie Kwan) made an offer to Ka-Ming, to be an undercover cop.

His duty was to get close to Yiu Sing-Tin (Wong Hei) and find his criminal activities.

Chin Pang's superior had told him to close this case, but he refused because he has some personal differences with Sing-Tin.

Yiu Sing-Tin is a successful game developer who opened an Internet cafe to hide his criminal identity which leads Ka-Ming a chance to join his team with his exceptional computer skills.