Chen Congming (played by Wang Luoyong), who teaches "Mental Health", made shocking remarks in the class for evaluating professorial titles. The principal could no longer tolerate this crazy teacher, so the latter entered a profit-seeking mental hospital for temporary residence. Liang Haichao (played by Yuan Wenkang), who works in this hospital, can't forget his ex-wife Liu Yue (played by Zhang Jingchu). After being enlightened by Chen Congming, Liang Haichao decided to take his ex-wife back from Xiao Chunlei (played by Chen Xiaodong), who runs a tonic pharmacy. At this time, Liu Yue, who was accompanied by tonics every day, collapsed at work and was also sent to a mental hospital. With the help of Chen Congming, Liang Haichao rescued Liu Yue, but Xiao Chunlei took Liu Yue's medicine, which caused his emotions to lose control and was detained in the mental hospital. Liang Haichao believes that the time has come to take back his ex-wife, and Chen Congming begins to think about helping the victim Xiao Chunlei...