A mysterious fugitive, a hijacked aeroplane, and a daring mid-air escape. This is the extraordinary, real-life tale of one of the greatest unsolved heists in American history and a case that has taunted the FBI for decades. There are four possible suspects - The Mystery of DB Cooper brings their stories to life through candid testimony, archive and stylised drama. Each account is gripping and highly plausible. But who is telling the truth, who is lying and – ultimately – who is DB Cooper?