Famous movie star Zhan Erbang (played by Tony Leung) often plays heroic roles, but in real life he is a coward, causing his beloved wife Man Qiong (played by Annie Yu) to leave him. Since then, he has lived with his two daughters, Liam (played by Gillian Chung) and Crispy. Tienan (played by Jordan Chan) and Janet (played by Tian Pujun) are both Interpol. When they learn that the terrorist Long Yi (played by Elvis Tsui) will go to Hong Kong to get another biological weapon, they mistakenly enter Erbang's home during the fight with terrorists in Hong Kong. Tienan was injected with a virus that degrades intelligence, and his IQ is only that of a 4-year-old child. Man Qiong came back from Hollywood and planned to discuss cooperation with Erbang, but was broken into by terrorists. They learned that the missing virus was in Erbang's home. In the process of fighting against terrorists, Erbang showed rare courage and wisdom for his daughter and ex-wife, successfully arrested the criminals, and won back family members.