Working for a counseling helpline is never boring, but when Yoochae takes one last call for the night, she learns of a company's sinister secret from the charming yet rash Sunho. Suddenly, that company's best problem-solver, the handsome Yool Sun, pays her a visit and offers her a fake job as a mental health counselor to secure her discretion. Determined to earn her keep at this cold conglomerate, the feisty but caring Yoochae opens her heart to her fellow employees and finds herself juggling the interests of both Yool and Sunho.