Tiansoh is an orphan girl who parted from her family since childhood. One day she learns that her mother is Roong-arun, a staff of Mae Chansri’s seamstress factory who disappeared without a clue. Tiansoh decides to apply for a position there to investigate the truth. She only has a Laisoh sarong as the only clue to the mystery. Phuwadol, the factory manager also helps her to find her true family.