Plot
After her former boss, private detective Bernie Pryde, dies and leaves her his agency, Cordelia Gray is hired to investigate the suicide of Mark Callendar, a promising university student from a powerful family who abruptly abandoned his studies, moved to a remote cottage, and took employment as a gardener and handyman before hanging himself. Cordelia is hired by Mark's father, James, a prominent real estate developer, and his aloof assistant, Elizabeth.
Cordelia visits the cottage where Mark committed suicide and speaks with Miss Markland, the property owner who discovered Mark's body. Cordelia then travels to the nearby Callendar family's country house, where she is left in the company of Elizabeth, who shows her home movies of Mark. Cordelia is subsequently met by Andrew, a family friend and elder brother figure to Mark.
Cordelia goes to visit Mark's university friend Isobel, who rebuffs her when she suspects Cordelia is a journalist. Cordelia learns from the coroner that traces of purple lipstick were found on Mark's mouth, leading them to believe a woman kissed him prior to his death. Cordelia suspects the woman to be Isobel. Upon further questioning, Isobel recounts to Cordelia how she in fact discovered Mark's body in the cottage the night he died, and that he was wearing women's underwear and had purple lipstick smeared across his mouth. Isobel claims to have phoned Andrew, but says she left his body untouched. When Cordelia questions Andrew, he claims he went to see Mark's body, but that Mark was not wearing women's clothing or lipstick as Isobel had claimed.
A perplexed Cordelia returns to the cottage and attempts to recreate Mark's suicide using crime scene photographs and the belt he fashioned as a noose. The attempt goes awry when Cordelia nearly hangs herself, only to be saved by a young boy who happens to witness the incident through the window. Later, Cordelia is approached by a confrontational Andrew, who threatens her. Upon finding clues in a prayer book in Mark's cottage, Cordelia concludes that his mother Eve, who died during Mark's childhood, was not in fact his biological mother; Eve left a clue suggesting such in the prayer book, which had been recently given to Mark by Elizabeth on his 21st birthday. Cordelia confronts Elizabeth about this, as Elizabeth claims to have delivered Mark in Italy when she was working there as a nurse. Elizabeth tells Cordelia she will meet her at the cottage later that night to discuss the matter.
Upon returning to the cottage, Cordelia is attacked by Andrew, who has hidden in an upstairs closet, and is thrown into a well on the property. Cordelia manages to climb out of the well, and watches from a distance as Andrew goes to check to see if she has drowned. Upon finding the well empty, Andrew flees in his car, only to be followed by Cordelia. The two engage in a chase, ending in Andrew driving off of a bridge and into a river, killing himself. Cordelia returns to the Callendar estate, where she is met by Elizabeth, who admits to having given birth to Mark on behalf of the infertile Eve, as James wanted an heir to the family estate. Elizabeth agreed, and carried and birthed Mark under a contractual agreement. Elizabeth also admits to being the one who removed the lingerie and lipstick from Mark's body, and that she summoned Cordelia, not James, to investigate.
Cordelia realizes that it was James who in fact murdered Mark, angry over his son's defiance of his family upon learning the true circumstances of his birth. James staged Mark's death to appear as a suicide, and dressed his body in the women's lingerie and lipstick to humiliate him. Cordelia and Elizabeth arrive at the scene of Andrew's death near the river, where they find a despondent James. When Cordelia accuses him of Mark's murder, he denies it. Elizabeth coldly shoots James to death, and is swiftly taken away by authorities.
