Yang Kang-chil is a man released from prison after serving 16 years for a murder he did not commit, having lived a life scarred by betrayal and tragedy. Upon his release, he meets Jung Ji-na, a fiercely practical and somewhat cynical veterinarian who is guarded with her own emotions. Despite their vastly different backgrounds and past traumas, an unexpected and profound romance blossoms between them. As they navigate the complexities of society, the ghosts of Kang-chil's past, and his struggle to clear his name, they are aided by Lee Gook-soo, a quirky fellow inmate who claims to be a guardian angel sent to help Kang-chil experience three miracles in his life. The series blends elements of melodrama, fantasy, and deep emotional healing, exploring the fragile nature of life, forgiveness, and the transformative power of true love.