My Stand-In follows Joe, a stuntman for the famous actor Tong, who develops a deep relationship with Ming. Joe is devastated to learn that Ming has always seen him as a replacement for Tong. Heartbroken, he accepts work on a foreign film set, where a tragic accident claims his life.
In a twist of fate, Joe awakens in the body of another young man named Joe, who met with a fatal accident on the very same day. Gifted a second chance, he finds himself reliving his former life, surrounded by the same people, and inevitably encounters Ming once more. This time, Ming, having retained all memories of their past, longs to have Joe back by his side but struggles to understand Joe's renewed distance. Driven by love and regret, Ming embarks on a determined search to uncover the truth behind Joe's inexplicable return, hoping to rekindle their bond and finally provide the closure and explanation Joe never received.
Other names: ตัวนาย ตัวแทน, Tua Nai Tua Thaen