A Palestinian terror group, the PFLP-GC, funded by Iran is initially suspected in the Pan Am 103 bombing, but Scottish and FBI investigators find evidence pointing to Colonel Gaddafi's Libya.

The CIA hands over a Libyan double agent who provides crucial evidence in the Pan Am 103 bombing case needed to bring the two suspects to court. Complications arise when a key witness alters his testimony as the trial gets underway and forensic evidence is questioned.

A shocking verdict at the Lockerbie trial leaves the victims' families unsatisfied. Years later, fresh evidence comes to light which raises questions about the truth.