In order to investigate the truth about his sister's death, Yuan Jiesheng accidentally got involved in an old case.
Those dilapidated photos show the young lives that passed away one after another. The truth is forever sealed in the archives, making it impossible to call for justice.
The mentally disturbed girl at the beginning of the case became a prophet and sang a black nursery rhyme to him:
A twisted man, walking a twisted road.
Holding the twisted sixpence in hand, stepping onto the twisted steps,
Buy a crooked cat, the cat is catching a crooked mouse.
They lived together in a crooked hut.