Theo Duncan is just an ordinary student. Except he also happens to be the son of the Prime Minister, Will Duncan. While Theo and Sammy grapple with work experience inside Parliament, Westminster is shaken by the discovery of a body in the Thames. All signs point to murder. Journalist Erin Connelly is convinced the death is connected to rumours of MPs planning to break away from Will Duncan's party. With security heightened, Sammy and Theo must be especially clever to evade detection as they work with Erin, question MPs and search the Palace of Westminster for clues. The duo have one vital piece of evidence the police don't have. But can they gather enough evidence to bring the murderer to justice before Will's party tears itself apart and the murderer strikes again?