Synopsis: God of Ad-Lib

Lee Tae-gyu, a 30-year-old NEET, has at some point lost his capacity to experience emotional highs and lows, leading him to drift through life in a state of dull numbness. In his quest to break free from his meaningless routine, he encounters a mysterious old man who grants him the "will-o'-wisp ability" to replicate the emotions of others. As he experiments with this newfound power, he becomes involved with drama writer Kwak In-ho, and from that interaction, his life begins to take an unexpected turn toward acting, a journey he had never envisioned for himself. "Improvisation? I'm the best in the world at it."