Timely yet terrifying, The Flood predicts the unthinkable. When a raging storm coincides with high tide it unleashes a colossal tidal surge, which travels mercilessly down England`s East Coast and into the River Thames. Overwhelming the Barrier, torrents of water pour into the city. The lives of millions of Londoners are at stake. Top marine engineer, Rob and his father Leonard Morrison rush to the aid of his ex-wife and Barrier expert, Sam to try to save a city on the brink of annihilation.