Su Tangli has relied on her neighbor's brother Gu Yancheng since she was a child. The two grew up together, and their love gradually developed. On the day she came of age, Gu Yancheng confessed to her, and the two fell in love sweetly for four years.
A well-planned "betrayal" drama caused Su Tangli to walk away heartbroken. Little did he know that this was Gu Yancheng's painful decision to let go after learning that he was suffering from ALS.
When the truth came to light, Su Tangli was already pregnant with Liujia, and the affection she had in the past turned into a stranger. Only Gu Yancheng was left to guard her silently, leaving her with endless regrets.
Concept: Self-sacrifice in love and the dislocation of two-way redemption