• 'Kim Jongin' is a single father of his only son. He was known as a popular young entrepreneur who owns big companies. He doesn't have any intention to get a new wife until something unexpected happens. • 'Oh Sehun' is only a broke college student who lives alone in the big city. He only focuses to work, work and work to pay for his college fees. His life completely changed after a sudden incident. -- Have you ever think that even a slight incident can change your life? What if, it really happens.