The story about an epidemic on the island and the survival of the people. They made the story very well and each one done their part beautifully. How humans can never change their greed and do anything for their survival explain well. Each character got interlinked well with progress of series and you never know what will happen. No one is the hero of the story everyone of their part to play in series. It shows how the inner human animals came into picture when the person care about himself and his family. The Switch. Who will you save 4 hundred or millions. The conservation and human encroachment shows very well. Must watch. Hope they will make next season soon.