野野宮良多與妻子綠育有一名6歲的獨生兒子慶多，一家過著幸福快樂的生活。然而，有一天醫院來電通知他們一個「重要訊息」，慶多在醫院與另一個同一天出生的孩子調亂了，悉心栽培了6年的兒子竟然是別人的孩子。6年間的愛，他應該執著於「血緣」還是「情緣」…… Ryota is a successful workaholic businessman. When he learns that his biological son was switched with another boy after birth, he faces the difficult decision to choose his true son or the boy he and his wife have raised as their own.