The drama is about ambitious people clamoring to claim more power and success for themselves: an ambitious woman, a man born in a wealthy family and another woman who wants to escape from her poor background.

A karaoke in a rural town called "Karaoke Crazies" is run by Sung-wook. Business is slow and when Sung-wook posts karaoke singing along job to boost sales, a girl in early 20's, Ha-suk ...

'Lee Seon' dreamed of becoming a wise mother and wife, leaving her unfortunate past behind. But there was no proper man in this world! Thinking that starting over was the only way out, she dreams of a new love by faking suicide. Absurdly, 'Lee Seon' faced a real death! The moment your breath stops, the seven-day time slip door opens to look back on past relationships... Will her love be rewarded?