Khánh, a young university assistant, has a passionate one-night stand with a charming student named Báo. Their brief connection seems fleeting—until Báo announces his upcoming wedding and invites Khánh to meet the family. To Khánh’s shock, Báo’s fiancée turns out to be his own sister, making Báo his future brother-in-law. Caught between forbidden desire and familial duty, Khánh must navigate a tangled web of emotions, guilt, and unspoken truths in this intimate and provocative Vietnamese BL mini-series.