A young lady finds herself caught in a mystery of murder, as she accompanies the frightened young girl, a witness to the crime, and her guardian, a nobleman renowned for his notorious behavior, to a nearby castle. After arriving at the noble gent's estate, the three think themselves safe from the killer, who may be on their trail. But as the scandalous incident brings the young woman and the nobleman together, she finds that it is her heart that's in danger.