Lu Ye, the son of a police detective, tore up his will with his own hands just to find out the truth about his father's death. The "suicide" case three years ago left no traces at the scene, but there were hidden words written in blood by his father before his death: "Don't trust Cen Xiao." When all the evidence points to his most trusted partner, criminal investigation expert Cen Xiao, Lu Ye chooses to become a cold case hunter, using illegal means to get closer to the core. But when he finally pried open Cen Xiao's safe, what was inside was not evidence, but a stack of photos of his childhood. On the back of each photo was written: "I live for you."
