Min-seok Kim lost his Japanese parents at a young age and was adopted into one of South Korea’s most powerful chaebols.

Once seen as the golden heir, his world shatters after the sudden death of his adoptive father.

Ousted from the family and stripped of his position, he returns to Japan for the first time in 23 years, carrying a heart full of grief.

Momoko Kawase, who lost her father in a tragic accident, overcame a childhood of poverty to become a dedicated doctor.

Driven by the vow that "no one should ever have to endure the same pain I felt, she fights every day to save her patients' lives.

When Min-seok and Momoko cross paths in Japan, they have no idea that they had already met once as children.

Nor do they realize they are still bound together by a single phrase: "There is no tree that won't fall after ten strokes."

Unaware of their shared past, they begin to fall in love, crossing borders and the 23 years of time that kept them apart.

But unexpected trials begin to strike them one after another…

This is a turbulent yet pure love story about two people who refuse to give up, no matter how difficult the struggle, as they fight for their destiny.