Ron Artest (Jackie Chan) has volunteered to be an unfettered seaman since childhood, but his brother du du (Sammo Hung) is born with mental retardation. Artest, who has been dependent on each other since childhood, has never realized his dream in his heart. Became an ordinary policeman. But Ron Artest is not happy in the police station, and because of his unrestrained nature, he is very unpopular with his boss. Finally, after a confrontation with his boss, Ron Artest resigned angrily and decided to become a seaman. Seeing Ron Artest resign, du du thought his brother was ready to abandon him and began to try to be self-reliant. One day, when he was playing games with the children next door, he accidentally picked up the jewels left by the robbers. The brother of the child next door was greedy for money and pushed Doodle down the hillside and robbed him of the jewels. Unexpectedly, the robber returned and killed him. At this time, Ron Artest heard the news, killed the robber after a fight, and rescued Doodle on the hillside. Ron Artest could not avoid going to prison for killing people.