Forensic doctor Shen Zhixia discovered a terrifying pattern on the autopsy table: Every time an unknown corpse with a "thorn tattoo" was dissected, a countdown scar would appear on her wrist. When the scar disappears, a new death will occur. What's even weirder is that the fibers in the corpse's fingernails are exactly the same as the material of the coat left by his partner Lu Ze who disappeared three years ago. When the last scar begins to burn, there are only 48 hours left for Shen Zhixia - she must uncover the connection between the disappearance of her partner and the serial death case before she becomes the next "thorn corpse". Only then does she discover that she has been involved in a hunting game with "life as a bet".
