In a German county north of Hamburg rests a town named Sommerwood, where Ruby and Rosa Muller, two enchanted sisters, live. Engaged to be married, Ruby is a feisty teenage girl, while Rosa is more subdued and mature. One day, their mother becomes ill, and Rosa sends Ruby to fetch help. But instead of aid, Ruby stumbles on the doctor's murdered body, then encounters a strange man she's never seen before. Throughout the county, young women are vanishing, and the king is distraught. Appointed to investigate the mystery, Sir Jonas Martin promptly travels to Sommerwood, the geographical center of the disappearances. There, he meets Ruby and Rosa, who are both taken with him. But when Sir Jonas discovers that Ruby's fiancé is the man she saw outside the dead physician's house, suspicions arise. As Sir Jonas follows a lengthening trail of bodies and danger, romance and passion deepens between the two sisters and their suitors, even as the suspense and tension build, leading to a surprising twist and conclusion in this delightful, engrossing adaption of a lesser-known Brothers Grimm fairy tale.