But when the Conservative leader announces his resignation and Ben considers standing, Martin fears his bid for power could uncover secrets from their past. © Rob Youngson / ITV / World Productions Luke Evans as Martin Gilmour in The PartyIf the first look images are anything to go by, viewers can expect plenty of high-stakes drama. Plus, with the promise of sex, power, betrayal and secrets, what's not to like? The synopsis continues: "Three decades on, Martin is invited to Ben’s lavish birthday party at the Fitzmaurices' country pile. The news of the Conservative leader’s resignation threatens to derail Ben’s party, as he considers announcing his intention to stand.