In the 55th episode of Dark Glory, Sun got an important intelligence clue, that is, in order to protect his identity, he had plastic surgery on his fingerprints. In order to confirm the truth of this statement, Sun made a special trip to Chengdu to find Lisa, and confirmed this fact through fingerprint comparison. In the face of Lisa's questioning and threats, she resolutely chose to trust Sun and help her escape from capture. This episode shows Sun Zhengzhi's brave side and lays a key foundation for the development of the subsequent plot.