In the puppet state of Manchukuo in the 1930s, four Communist party special agents, after returning to China, embark on a secret mission. Sold out by a traitor, the team find themselves surrounded by threats on all sides.

An international security company assigns Long Xiaohu and his comrade Gao Feng to escort an unknown creature. On their return journey, they are unexpectedly ambushed by armed gangsters, leading to a disastrous incident. Framed as kidnappers, they face severe misunderstandings from their families and colleagues.