Ye-in, born as an illegitimate child of a chaebol family and abandoned by her mother at a young age, enters into a contract marriage with Tae-heon, a second-generation gangster-chaebol, at her family's request, but ends up falling in love with him. Upon finding out she is pregnant with Tae-heon's child, Ye-in decides to divorce him to protect the baby. However, Tae-heon, who used to be completely indifferent and heartless, suddenly begins to hold onto her. "You've used me as you pleased, so let me go now." "You love me. What are you going to do without me?" ... "I did love you." Tae-heon, a cold-blooded man who has never known the feeling of love in his life, and Ye-in, who tries to break free from him. The hearts of the two keep missing each other...