On December 21, 1988 a massive explosion causes chaos in Lockerbie, Scotland; families learn that Pan Am 103 has crashed, killing 270 people; foul play is confirmed; an international terrorism investigation begins.

A Palestinian terror group 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.

A Libyan double agent offers crucial evidence in the Pan Am 103 bombing case; complications arise when a witness alters testimony and forensic evidence is questioned.

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