Serin, a young girl unhappy with her life, receives a mysterious invitation to the Rainfall Market, a magical place that appears during the rainy season. There, visitors are given the chance to exchange their current life for a new and supposedly better one.
Guided by an enigmatic cat, Serin explores different shops that offer alternate lives and identities. She must choose the life she wants within a limited time, but she slowly realizes that changing her life is not as simple or perfect as she first believed.
Through her journey, Serin learns to reflect on her desires, regrets, and the true value of her own life.