Bloody Romance Episode 4

Wan Mei prepares for her first mission. The target is a doctor named Shen. Wan Mei and Wen Xiang attend his birthday ceremony. Wan Mei captures the doctor's eye but Wan Xiang fakes an injury and attempts to seduce him. In order to help Wan Mei, Chang An poisons himself. Doctor Shen tries to save him but Chang An tells Wan Mei to kill him. She refuses because she believes the doctor is kind. Instead, she takes the precious herb, Gua Jian grass that they were there for. They get caught before leaving and have to take the doctor as a hostage in order to escape. Still, Chang An is shot with an arrow. Once they return, Cha Luo threatens Wen Mei by showing her a shadow who is skinned alive because he and his master fell in love. Wan Xiang reveals that she killed doctor Shen and that Wan Mei did not kill the doctor out of kindness but then Wan Mei reveals that she got the Gua Jian Grass. Since each girl finished one part of the mission, they still cannot choose one of them to become a Di Sha. Cha Luo decides that their shadows will have a fight to the death. The master of the one who survives will become a Di Sha. Chang An is injured and so he can't fight. Wan Mei interferes. (Source: Autumn carrot at MyDramaList)