Typhoon Haiyan swept through the Philippines and left a trail of destruction in its wake, with winds that gusted up to 270km/h creating walls of water two storeys high. Thousands of people have died and millions more are struggling to survive, desperate for food, water and shelter, in a crisis that has triggered one of the world's biggest relief operations. The full impact of Typhoon Haiyan is explored in this heartbreaking but insightful documentary combining extraordinary first-hand accounts from survivors, footage from several dedicated film crews on the ground in the Philippines, and expert testimony from renowned scientists.