Neuroscientist Dr Yvonne Churcher has problems in the world beyond her lab. One of her students, James, a dangerously attractive anti-science protestor, has set out to challenge her entire philosophy about how the brain works. His friend, Gareth, a brilliant, unstable computer genius, is obsessed with the biochemical basis of memory. When he tries to persuade Yvonne to get involved with a plan to stimulate memory artificially, it sets off a chain...