Ah Wen (played by Lau Ching Wan) is a private detective who often exploits his two associates Ah Jie (played by Louis Koo) and Chi Pao (played by Jordan Chan). They took back a magic lamp from an antique shop. Ah Wen threw the lamp on the street, and a witch named Hami Bobo (played by Cecilia Cheung) emerged from the lamp. Bobo came to Ah Wen's detective agency. Bobo asked each of them to say a wish, and only after it was fulfilled could Bobo return to her own world. Ah Jie and Ah Wen thought she was Chi Pao's cousin. But the spell failed, and Ah Wen and the others didn't believe her, so she had to help Ah Wen and the others all the time. Ah Wen's card game was disrupted by Bobo's failed spell, and he became enemies with Shi Jian (played by Francis Ng), and Shi Jian also recognized Bobo's cousin, the Chopsticks Sisters (played by Twins), as his goddaughter. As a result, jokes continued to be made.