Helen Matthews is going through a very difficult period in her life, because most recently she lost her beloved spouse, with whom she lived more than one happy year. In order to be alone and try to correct her grief, she leaves medical practice and goes to a family cottage located on a small island. Restoring order in the house and indulging in pleasant memories, the woman did not expect at all that very soon an uninvited guest would come to her. Entering the young wounded man into the house and giving him first aid, Helen did not even think about what would endanger her own life, since in his wake there was a ruthless killer who intends to bring the job to an end ...