Police officer in the Southern Precinct, WU Ying-xiong, has been revered as a hero in the Harbor City ever since he stopped the terrorists on a Boeing 777 airplane and kept the city safe. Unfortunately, the peace is only temporary… Panic spreads the whole city as a series of bomb explosions happen within hours and this is just the beginning of a tight-knit conspiracy. Facing the unprecedented crisis, the two-men team of totally opposite characteristics is the only hope to reverse the situation....