Kang Min Ho’s (Jung Kyung Ho)father ran a large company, but sudden death of his father led to his uncle taking over the company. After that, he gets kicked out of this company.

He then undergoes a heart transplant surgery and his personality changes due to cellular memory syndrome. He begins to have warm feelingsand falls in love with Kim Soon Jung (Kim So Yun) who is a secretary. He then realizes the true meaning of love and happiness.

Meanwhile, Joon Hee (Yoon Hyun Min) will form a love triangle with the leads.