· Female protagonist: Su Jinshi (25 years old), on the surface she is a mature and independent jewelry designer, but in fact she is slightly anxious about growing older and had a fruitless secret love. She has an unknown past - she accidentally saved a boy many years ago.
· Male Protagonist: Xie Beixiao (22 years old, actually a "little milk dog" disguised as 26 years old), the secretive leader of the Xie Group, sinister and paranoid, and laid a gentle trap in order to find the "sister" who illuminated his dark life many years ago.
