In the near future, everyone has access to a memory implant that records everything they do, see and hear - a sort of Sky Plus for the brain. You need never forget a face again - but is that always a good thing?
In the future, thanks to the Grain, a chip which can be implanted on a hard drive in the brain, every single action that a person makes is recorded and may be played back. Liam, a lawyer, married with a child, suspects that his wife Fi is having a fling with the brash Jonas, whom they meet at a dinner party.