Welcome to the Hotel Artemis - and an opening night to remember. 1926. Diana Gold, owner and impresario, throws open the doors to the most opulent new hotel in London. As the champagne flows and the chandeliers shimmer, millionaires and gamblers rub shoulders with film stars and royalty. Yet nothing at the Hotel Artemis is quite what it seems - not least two infamous guests who Diana expects at midnight. Powerful and dangerous, they've dragged her from the gutter and taught her all she knows. Now they're calling in her debt - and Diana must take perfect care of them, unless they take care of her first. But when a body is found in the hotel's finest suite, the lavish opening night begins to spiral out of control. And over 24 fateful hours, the staff and guests of the Artemis will find out why they are really there.