Douglas Ashburner has his Stag Weekend in Warsaw while his fiancée, Susanne, goes to Paris for her Hen Night. But her weekend is interrupted by gunfire outside the hotel and things are never quite the same again for the couple. A French policewoman kills two of the attackers outside the hotel, but the third gets away and returns to Scotland. The French policewoman accompanies the Hen Party back to Scotland where she joins Douglas’ team as they hunt the man before he can complete his mission. Time is running out for Douglas as he struggles to complete the task before his wedding.