For Dr Steven J. Fisher, love is no more than a chemical equation - and he's nearly solved it. A brilliant and utterly focused young biochemist who spends his time in an Oxford research lab studying orgasms, Fisher is on the brink of inventing a Viagra-like pill for women. It's a career high for any scientist, and the holy grail for the pharma company that funds Fisher's work. But, just weeks before the product is due to launch, a last-minute case study throws his perfect results into disarray.