The female lead has night blindness, so once it gets dark, she can't see a thing. Her husband doesn't mind and is super caring towards her. But he has a weird quirk — every time they sleep together, the lights must be off. One day, Su Nian discovers that her husband isn’t really her husband — she’s pregnant, but her husband is infertile.
During a typhoon night, the female lead’s house loses power, and she's trapped in the dark. A strangely behaving man bursts in, claiming to be her husband. She finds herself in a crisis and dilemma in the darkness — who is this man claiming to be her husband? And is her husband really her husband?
It turns out the mother-in-law gave birth to triplets: the eldest son Chen Ming, the second son Chen Fei, and the youngest son Chen Yu. Out of the three, only the eldest was successful, making it big in a major city, but he died unexpectedly six months ago. To protect the family's wealth and status, the mother-in-law decided to have the second son, Chen Fei, take Chen Ming's identity, inheriting his business and love, even though he had to give up his original lover (his sister). Because Chen Fei was infertile, they took advantage of Su Nian’s night blindness and swapped him out with Chen Yu during intimate moments.
In the end, the greedy family faced legal consequences, and the female lead got a fresh start on life.
