In World War II Bangkok, a servant-turned-actress lets envy consume her as she schemes against a noble family’s daughter and risks everything to win the man she loves.

The Yarns tells the story of a serial killer who leaves no traces, only strange knitted yarns placed on the victims. Inspector Pilanthorn partners with Sky, an autistic woman with an extraordinary ability to decode complex patterns, to uncover the meaning behind the yarns and stop the killer before the next murder takes place.