A mysterious traveler blackmails a young TSA agent into letting a dangerous package slip through security and onto a Christmas Eve flight.
 
                         KEEP
                        CALM
                             &
                       CARRY
                           ON
                         WITH
                         THIS
                          ONE
 
FUN FACT:  The name of the airline at the end of the movie is Trans Global Airlines. Certainly an homage to the 1970 classic disaster movie "Airport" where the bomber picks a Trans Global Airlines flight.