The Obsession (2016)

Time went back to the day when Shun happened to witness Lun, who involved in drug trade, assaulted Han on the rooftop of their high school building. Han then committed suicide. Under the shadow of hiding the truth of Han's death, Shun ratted Lun out and turned to counselor, Ms. Hsu, for help. Lun was therefore under arrest. Several years later, Shun became a social worker of an elderly foundation. Besides, he and Ms. Hsu's relationship got closer and closer. Shun served the elderly day after day, and especially took care of Grandma Han, who was Han's only family. However, good time never last long; Lun was released on parole. He came to find Shun right away, and forced Shun to get into a drug trade. Unfortunately, Shun's beloved ones, Ms. Hsu and Grandma Han, began to fell into danger one after another...