A man who can stop time meets a woman unaffected by time. Moon Joon Woo is a seemingly-ordinary person, except for the fact that he can stop time. His special ability makes him lonely and he finds no meaning in life. When he needs somewhere to live, he moves into a basement owned by the building owner, Kim Sun Ah. Kim Sun Ah is a hard-working, financially struggling girl who appears to have much joy in her life, but in fact struggles to pay off her father's debt. Joon Woo finds that when he stops time, Sun Ah is not affected and continues to walk amongst a time-stopped world. With bubbly Sun Ah by his side, can the lonely Joon Woo begin to find the meaning of his existence?