Ma Tianming, who was born in poverty, was framed and involved in a family-annihilation tragedy. During his escape, he accidentally replaced the identity of Cai Likun, a doctor who studied abroad, and hid in Hengshan Hospital. Red businessman Zhu Tiande had a large amount of secret red funds in his hands, but he suddenly fell ill and fell into a coma while evading the enemy's pursuit, and was admitted to Hengshan Hospital. The spies of the Central Bureau of Investigation and Lixing Society, the Japanese military, the Shanghai Green Gang and other forces were all eyeing this huge sum of money. Cai Likun, who was also admitted to Hengshan Hospital due to serious gunshot injuries, was the special commissioner sent by the Soviet area to meet Zhu Tiande. He asked Ma Tianming to continue to maintain his fake identity, and the two formed an alliance to deal with various evil forces. In the dangerous battle of wits and courage, Ma Tianming, who was originally devoted to money, was moved by the noble character of the revolutionary Cai Likun, and truly grew into a Communist who was deeply aware of national justice. He finally defeated the villains, completed the task assigned by the organization, and also cleared his grievances.