The Leavenworth case

When wealthy Horatio Leavenworth is found shot dead in his locked Manhattan mansion, suspicion immediately falls on his two nieces, one of whom stands to inherit his fortune. With no one able to enter or leave the house, the case becomes a perplexing puzzle of circumstantial evidence. A junior lawyer and an unassuming official investigator must untangle the web of secrets to uncover the truth behind the seemingly impossible crime.