When criminal investigation team leader Fu Chen was investigating a perfect secret room murder case, he discovered that there was an old photo from 20 years ago in the diary of the deceased - the little boy in the background was his young self. What's even weirder is that at every new crime scene, a puzzle piece appears, which actually spells out the floor plan of the Fu family's old house.
When he followed the clues and broke into his father's study room, a dried corpse suddenly rolled out of the wall, wearing the same watch as Fu Chen's. The forensic report showed that the DNA of the deceased closely matched that of Fu Chen, but the time of death was the year he graduated from college.
"Captain Fu, what you are tracking down is never the murderer," psychologist Su Nian handed over the blood-stained file bag, "but the false life that was implanted."
On a rainy night, Fu Chen uncovered the white cloth in the morgue. Lying quietly in the refrigerator was the third "self" - this time a fresh corpse with Su Nian's pen inserted in his chest.
Surveillance showed that the last person to enter the morgue was Fu Chen himself, holding a cup of coffee.
