Poor little girl Sally was diagnosed with congenital heart disease from the day she was born. She overcame the first difficulty of her fate with her tenacious vitality, but the road thereafter was still full of twists and turns. Her mother Mochizuki Sara (played by Miho Nakayama) was worried about her daughter's health, and she was willing to abandon her happiness as a wife for this, and finally divorced her husband Takehiko Saeki (played by Eisaku Yoshida). The daughter grew up day by day and reached the age where she could undergo a heart transplant. Anxious Sara had nowhere to go, and left a message while browsing a suicide website, "If you want to die, please give your heart to my daughter." Although his behavior was frivolous, a young man (played by Tsuyoshi Domoto) really responded. The young man was diagnosed with a terminal illness, and he seemed to hope that he could at least help others in the end as he was dying. Due to legal regulations on organ trading, the young man could not designate a heart transplant to Sally. But at this time, he proposed to marry Sara and complete the transfer of life as a father...