History professor Shen Yanli and photographer Lin Ye met because of Shen Yanli's sister Shen Yanyi. Lin Ye has liked Shen Yanyi for many years. He has been thinking about her since he was protected by her in junior high school. Even if Shen Yanyi got married, he still couldn't let go and always wanted to get closer to her.
Shen Yanli looked very similar to his sister, so Lin Ye would often ask him questions, stare at his face in a daze, and secretly take photos of him, because looking at him seemed like seeing Shen Yanyi. The word "" in the tattoo on his heart is also for Shen Yanyi.
But Shen Yanli didn't understand this. He felt that Lin Ye always looked for and stared at him, so he must like him. From the beginning, he thought Lin Ye was "frivolous", but gradually got used to his existence, and even decided that the two liked each other because of Lin Ye's drunken nonsense and the tattoo on his heart.
When Shen Yanli plucked up the courage to confess, Lin Ye revealed the truth: all the closeness was because he looked like Shen Yanyi. Shen Yanyi had long been fed up with Lin Ye's entanglement, and wanted her brother to "take over" and get rid of him. Later, in order to inquire about Shen Yanyi, Lin Ye cried and begged Shen Yanli to date him. Shen Yanli knew that he might be a substitute, but he couldn't help but feel soft.
Until Shen Yanyi got pregnant and asked him to let go, Lin Ye's fantasy was completely shattered. Facing Shen Yanli, who had been waiting for him, he finally began to hesitate: should he continue to live in the past, or should he look at the person in front of him who truly loved him?
