Murder Call

Professor Richard Worthington, a well know identity in the world of medical research, and employee of bio-chemistry lab, cook Laboratories, is panicked when his assistant, Carl Tatum, is locked inside a vault. Worthington’s secretary, the keeper of the combination to the vault, is summoned immediately, but only minutes later she is found by another employee of the Lab, kneeling beside the dead body of Worthington – who has been fatally wounded by a single blow from a screwdriver.