After a car accident, Su Wan is saved by a mysterious young man who risks his life to rescue her. He leaves behind only an iris necklace, then vanishes without a trace.
The necklace is the only keepsake left to her by Shen Zhiyu, who had silently stayed by her side for years and has long since passed away.
Late at night, the necklace glows and the System binds itself to Su Wan. She is forcibly sent into a short drama written by Shen Zhiyu before his death. Her mission is to win over the original male lead and follow the official romance plot.
But she has no interest in the domineering male lead. At first glance, she's drawn instead to the second male lead, Shen Zhiyu, who seems frail and easy to bully, and is three years younger than her.
He appears harmless on the outside, but believes he's nothing more than an insignificant supporting character.
Su Wan defies the System three times, and each time she's sent back to reality and has her memories erased. Meanwhile, after losing her again and again, Shen Zhiyu in the drama becomes completely consumed by darkness.
The moment the short drama collapses, he crosses over from the virtual world into reality.
The iris is a key, a force of will, and the destiny that carries him across life and death, across dimensions, all so he can reach her.
