Sina disguises herself as her disable older twin sister, Siya, and moves back in the Sutharak's house with her 2 years old nephew, Kaosuay. She learned that her nephew is the benefactor of her brother-in-law's wealth upon his death. Her brother-in-law's will states that in order for Kaosuay to inherit his wealth, his wife must marry his younger brother, Athira. Sina, under the disguise of her older sister, decides to marry Athira for the sake of her nephew's future. She has no idea what obstacle lies ahead …