Six Locked Doors examines the story behind the deadliest nightclub fire in American history. On November 28, 1942, the Cocoanut Grove nightclub was the swankiest place in Boston, Massachusetts, attracting socialites, athletes, celebrities and World War II army and navy personnel. With double the allowed occupants, locked doors, flammable materials and a host of other deadly conditions, the tragedy left 492 people dead. Six Locked Doors explores how corruption, greed and a former gangster-run speakeasy led to an unimaginable tragedy. The film features interviews with survivors who have never before spoken on camera and showcases an extensive archive collection of photos, and unreleased vintage footage. A tragedy of enormous historical significance, the Cocoanut Grove fire set the standards for modern day fire codes, led to major changes in medicine, and resulted in the first conviction of involuntary manslaughter.