The heroine is an intern at Yue Lao's office in the fairy world. Because she led the wrong red thread to two brothers, she was driven down to the human world by her master to cut the red thread. In the process of cutting the red thread, the heroine accidentally connected the red thread of the older brother to herself.
The master in the fairy world asked the heroine to cut the red line between her and the hero, and help her brother find his true destiny.
The heroine seeks help from her second senior brother, Lang Mu, who was kicked out of the human world twelve years ago because of his homosexuality. She learns that the only way to cut off the red thread between gods and mortals is to tie countless red threads to the male protagonist.
The heroine also understood during the conversation with Langmu that love does not only occur between men and women, so she disobeyed her master's order and brought Langmu to be with her brother.
In order to let the heroine return to the fairy world as soon as possible, the heroine's senior brother pretended to be the heroine's boyfriend to make the hero jealous, and arranged for the hero's Bai Yueguang to return to China.
It turns out that Bai Yueguang is a ruthless character. She kidnaps the heroine and forces her to leave the hero. But in the end, the male protagonist arrived in time to save the female protagonist and cut off the red thread on his body.
