Season 1 Plot
Yuan Yingcai, a teacher from an art school, falls to his death. His twin brother, Yuan Yingjie returns from France to settle his affairs and finds out that his sister-in-law Fang Aixin and Jiang Xiaolei, whom he was secretly in love with, are cousins. The police concludes that Yingcai’s death is a suicide. Meanwhile, Yingjie discovers Yingcai’s student Ethan had plans to kill Yingcai.
Devil Behind the Gate Season 1 aired on April 28th, 2025.
Season 1 Episodes
1. Episode 1
Yingjie suspects that the mentally unstable Ethan’s hatred toward Yingcai drove him to murder, but when Yingjie visits Ethan’s workplace, a deadly case of mistaken identity nearly turns fatal.
2. Episode 2
Yingjie suspects that Ethan’s mental instability and hatred toward Yingcai may have led to murder, but when he visits the bee farm where Ethan works, a deadly misunderstanding unfolds.
3. Episode 3
After Ethan is ruled out as a suspect in Yingcai’s death, Yingjie stays behind to uncover the truth, as rumors of a forbidden romance and a mysterious nude painting deepen the intrigue.
4. Episode 4
Yingjie learns that Xiaolei, the woman he once loved, is connected to Yingcai’s wife, but when he probes about a mysterious painting, he is met with silence.
5. Episode 5
Yingjie learns that Xiaolei once rejected him due to personal issues, but when she visits him after he falls ill, new revelations surface.
6. Episode 6
Yingjie’s investigation uncovers that Shanmei is innocent, and Yingcai was involved with her mother, Anna.
7. Episode 7
Yingjie uncovers Anna as Yingcai’s secret lover, who admits to a toxic relationship, while Xiaolei suggests that Yingcai’s suicide was driven by love, urging Yingjie to let the past rest.
8. Episode 8
A jealous Yingjie confesses to Xiaolei when her colleague gets cozy with her. Worried that Yingjie might uncover more secrets, Aixin warns Xiaolei against falling in love with him. To pay for his severely ill son’s medical fees, the principal Youli arranges an illicit tryst between a mysterious sponsor and a student Vincy. When Yingjie stumbles upon them, Youli admits to having an affair.
9. Episode 9
Yingjie uncovers a web of betrayal involving his brother and Youli pimping out Vincy, whose attempt at blackmail puts her life in danger.
10. Episode 10
When Vincy goes missing, Yingjie suspects foul play and uncovers clues pointing to Youli, who, after a warrant is issued, goes on the run and violently confronts Yingjie and Xiaolei.
11. Episode 11
While grieving in prison over his son’s death, Youli fades from the picture as Xiaolei and Yingjie grow closer—until Yingjie discovers evidence linking Xiaolei to a mysterious intruder.
12. Episode 12
Yingjie’s suspicions grow as he uncovers more secrets, including Xiaolei’s attempt to frame Ethan for Yingcai’s death and Aixin’s confession that jealousy drove her to conspire against Xiaolei.
13. Episode 13
After Yingcai’s death shocks his family, Yingjie grows closer to Xiaolei, who struggles with harassment and past trauma. When Yingjie discovers suspicious evidence, they uncover a dark mystery that questions whether Aixin was involved in Yingcai’s death.
14. Episode 14
Wu Xia struggles with guilt over Yingcai’s toxic relationships, while Yingjie feels responsible for his brother’s resentment. As Aixin seeks revenge on Andy but dies in a car accident that Andy survives, a grieving Xiaolei sets out to track Andy down.
15. Episode 15
Yingjie discovers Aixin’s letter revealing her regrets toward Xiaolei, while Xiaolei, overwhelmed by anger, holds Andy hostage and considers killing him.
