Lang, a failed detective who drifts from one day to the next between empty romantic flings, is surprised to receive an invitation from the marquis of Catedral to attend a party at his mansion for the inauguration of the Alanka building, headquarters of his latest and most ambitious business venture. There, as well as the social elite always to be found at such events, he meets acquaintances who are equally unaware of why they have been invited. The celebration is abruptly interrupted when one of the guests is found dead in the garden with evident signs of violence. Chance and circumstance unite Lang with an extravagant group of people and together they will be forced to solve a mystery that will lead them to discover unimaginable secrets about their city.