Jonathan, Luke, Guy and Fiona are in Prague filming the Autumn Jazz Festival. When Fiona witnesses a man suspiciously filming a tram, she and the crew begin to uncover a Jihadist plot to bomb a symbol of the Czech State. The situation becomes a crisis when Fiona disappears. Brother Ian arrives from London and a desperate search is launched. Ultimately, they find themselves on the Ol anska tram in a frantic race against time to rescue Fiona and save the city as they travel to a deadly rendezvous.".