Ben's on a trip to London to meet his mum. But an accident at the Thames Barrier, combined with a tidal surge and a thunderstorm - and suddenly his trip turns i... » 

Ben's on a trip to London to meet his mum. But an accident at the Thames Barrier, combined with a tidal surge and a thunderstorm - and suddenly his trip turns into something totally different as the Barrier is breached and London is flooded. As Ben tries to get across London, little does he know that two terrorists have a similar rendezvous. «