The fallout in a chemistry teacher's life after her one-night stand with a good-looking but dangerous ducker and diver.

The fallout in a young chemistry teacher's life, after her one-night stand with a good-looking but dangerous ducker and diver. There is an instant, animalistic, spark of attraction before they become locked in a dance of mutual destruction. Only one can survive, but their actions will take a terrifying toll on all those around them.—BBC Two