Gary Scant, the ultimate romantic, is completely devoted to his childhood sweetheart, Mel - until he ends up sleeping with someone else after a boozy night out on the town. Gary's best mate, Kelvin, insists infidelity needn't change things - he's happily married but never misses the chance to play away - but can Gary really carry on as though nothing has changed?Appalled by what he did, Gary decides that the incident was a wake-up call, a reminder that he's been taking Mel for granted. With a little help from his friends, he sets about preparing the perfect Valentine's date for her. As the evening spirals out of control, Gary has to confront the painful truth about his feelings for Mel. Shellshocked by the Valentine's Day from hell, he makes a pact with recently dumped friend Paula never to compromise on love.