Nell, Simon, and their boy Art are ready to welcome friends and family for what promises to be a perfect Christmas gathering. Perfect except for one thing: everyone is going to die.

Johnny is a long-serving MI5 officer. His boss dies suddenly, leaving behind an inexplicable file which threatens the stability of the organisation.

Richard is assigned public service after crashing his homemade aircraft, leading him to meet Jane, a young woman dying of motor neuron disease. Jane wishes to be de-flowered before her death; Richard declines, struggling to maintain his relationship with his girlfriend, but offers to help pay for a gigolo to do the deed.