After her father passes away, Su Nian, the cherished daughter of the Su family, is betrayed by her beloved, Lu Chengyu, and her stepsister, Su Yao. Her stepmother, Lin Manyun, takes the opportunity to kick her while she's down. In a single night, her family is destroyed, and she is cast out onto the streets.
At her lowest point, the cold, taciturn Shen Juan appears. A faint scar on his left brow conceals a painful past; the mints in his pocket ease his insomnia, and he quietly offers Su Nian a glimmer of light. Leaving her softness behind, Su Nian draws strength from the will and diary her father left her. With Shen Juan protecting her, her father's old subordinate Chen Mo helping her, and her close friend Wen Ran by her side, she sheds her naivety and grows in secret. She trains in combat, studies business strategy, and tears away her enemies' masks of false virtue one by one.
Lu Chengyu's greed and coldness, Su Yao's jealousy and madness, and Lin Manyun's scheming and pathetic desperation are all laid bare before her. Shen Juan's protection was never a coincidence. A promise made years ago and a bond from childhood gradually come to light.
On the road to revenge, there is no absolute good or evil, only the complexity and struggle of human nature. Su Nian reclaims the Su family's business, punishes the wicked, and finally resolves the knots in her heart from the past. At last, amid the ashes and ruins, she catches the starlight that belongs to her and finds warmth with Shen Juan.