A passenger plane approaching Heathrow Airport request auto-land procedure, and the air traffic controllers can't understand why. When the plane finally lands, it turns out to be completely empty, with neither passengers nor crew aboard... So the Department is called in.
In research, Annabelle discovers the picture of a reclusive CEO boarding the plane, but his name doesn't appear on the passenger list. Meanwhile, Stewart finds the body of the flight's pilot in a warehouse that belongs to the CEO's company. Ultimately the clues lead the Department S team to Ireland - and into danger...