During the Northern Song Dynasty, King Kang was captured and imprisoned in a dangerous place by the Jin people. In addition to the Jin Prince (Chen Xing), the guards were also underworld master Wan Tiankui (Gu Feng). In order to save King Kang, righteous men from all walks of life came up with many strategies, but the terrain where the prison cell was located was really dangerous, and the enemy's defense was extremely tight, so everyone was helpless.