One man’s death led to another man's salvation. After years of suffering from heart disease, Da-ul receives a heart transplant from young and renowned pianist Yuwon, who has died an unfortunate death in a car crash. Da-ul’s life has been forever changed by this priceless gift, and he pledges to make every second of his life count in gratitude. But when he meets Yeonjo, the woman his donor was deeply in love with, and finds out that she has been living in despair, he begins developing ambivalent feelings towards her. Is it guilt, or could it be something else? "I will go on living. With this man's heart, that beat the rhythm of Andante." Da-ul was diagnosed with Dilated Cardiomyopathy at the age of 12. Four years later, a donor who will give Da-ul a new heart appears. Da-ul, who has received a new lease on life from the brink of death, and Yeon-jo, who is drifting away from the path of life after devastating losses. This is the story of a dead pianist who comforts these two living people.