It's General Election night, in the year 1983. The great and good have gathered in The Oyster House restaurant in central London to celebrate a Conservative victory that looks set to transform Britain. But when two masked gunmen burst through the door, chased by the police, and take a group of diners hostage, none of them will ever be the same again. Over the next four days confined in the Oyster House kitchen, one of the gunmen, Nathan, glimpses a different kind of life, dedicated not to crime but to cooking. But he has lost control of the situation and time is fast running out. His partner in crime, Trevor, is keen to hurt someone badly and the SAS are stationed outside and might end the siege at any time...