"Silent Echoes" follows Taehyung, a young man who grew up in an orphanage, shunned by others due to his muteness following a tragic accident in childhood. Amidst loneliness, his world brightens when Yn, a kind-hearted and famous singer, becomes the first person to reach out and befriend him. As their bond deepens, they navigate the complexities of communication and connection, discovering profound truths about empathy, resilience, and the transformative power of companionship in a world often defined by silence and isolation.

Taehyung, a devil who fell deeply in love with an angel, faces heartbreak when she dies. Reincarnated as a human in another life, she is unaware of her past. Determined to reunite with her, Taehyung transforms himself into a human, but in doing so, loses all memory of her face, name, and identity. Now a powerful mafia leader in the human world, Taehyung embarks on a relentless quest to find his lost love. Will he be able to rediscover her amidst the chaos of his new life?