Echoes of the Seven Deadly Sins

A series of baffling murders strikes Jiangchuan University once more, spreading fear and rumors. The legendary young woman Yang Xiaoyan sneaks onto campus to secretly investigate the mystery of the Seven Deadly Sins, only to fall into a demon's game. More victims appear one after another, and detective Luo Tian goes undercover at Jiangchuan University as a professor. A battle of wits and courage begins in secret. The mysterious Devil card, a tangled web of cryptic codes, and an airtight alibi: when the truth is finally revealed, the murderer turns out to be someone no one could ever have suspected. Is this the bloodthirsty killer who struck fear into people's hearts twenty years ago? Or is the culprit someone else?