What happens when an idol gets sick and is close to death but is saved by fate? Was it destiny to had received a heart that belonged to someone who loved singing as well or just plain coincidence? ForewordKyungsoo finds out that he has a bad heart and will only survive if he receives a heart transplant and after receiving it, his love for his career only grows. That leads him to search for who his donor was but will he be able to find out who it was or will it remain a mystery?