Sydney Airport's Baggage Manager Kevin is having a day from hell as he trouble-shoots a number of mechanical breakdowns that could bring operations to a standstill. Meanwhile, security screening discovers a passenger travelling with a gun and the Federal Police investigate a suspicious bag left at the terminal entrance.

The busy Christmas Season brings extra challenges with families escaping Sydney on vacation. But the airport is thrown into jeopardy of a shutdown with the discovery of an unidentified white powder on board an incoming flight. Speculation mounts about whether the powder is harmless, or the deadly terror weapon anthrax.