Min Young and Kim Bum hasn't been married for long.
However they're already having problems.
Kim Bum wants kids and a warm family before his grandmother past,
but Min Young prefer to finish college first.
They never really had much in common
but didn't stop to think if this was going to impact their relationship.
A year after their marriage So Eun returns home of studying aboard
and finds out her sister have married!
Without knowing about Kim Bum and Min Young difficulties,
she gets trap in one of their fights and that turn her world upside down.