Becoming Secret Nanny for Possessive CEO

Edith accidentally spends the night with her VIP client, Callum. The next day, she finds her fiancé, whom she's due to marry a week later, kissing a strange woman in a hotel room. Having been constantly manipulated by everyone, she feels devastated. She calls off the engagement after discovering the affair. Only Callum cares about her, even though they've only known each other for a week. Callum admits he suddenly wants to get close to Edith because he doesn't want her to marry the jerk, who is his half-brother. Knowing Callum's true intentions, Edith decides to start a relationship with him. But will their relationship continue to run smoothly?

While Edith is traveling with her little family, she suddenly experiences a mysterious accident. She loses her son in the accident and suffers from amnesia. Five years have passed, and she still doesn't know who her daughter's father is. She only knows Cliff (her ex-fiancé from five years ago), who has been a constant source of support. Is Cliff her daughter's father?

Whether it's a coincidence or not, when her daughter changes schools, she meets a boy who looks exactly like her. The boy was suspected of being her son who died five years ago. Furthermore, she was suddenly invited to meet with a man named Callum and asked to become his son's secret nanny and VIP designer. Callum deliberately pretended to think of Edith as a stranger to facilitate his plan. To this day, she still wonders who the killer who tried to kill them five years ago was.

Ultimately, Edith accepted Callum's offer because she was also curious about Callum's true identity. Was Callum her daughter's father? And, will she fall in love with the CEO who is very possessive of her as time goes by? Or will she marry Cliff, who has helped her for five years?