Missing is based on a true story. Luc Caron lives in northern France during World War I. One day, he sees three airplanes fighting in the sky. Luc watches in horror as a plane flips over and the pilot falls to his death. Luc is the only witness. The Greenwoods own an apple farm in Canada. Their son, a pilot, has been missing for 11 years. in 1928, they receive a package from England. The package contains a letter and three objects found at the site of a plane crash. How is the mystery of the missing pilot solved, bringing peace to Luc and to the pilot's parents?