After a night that, at his age, could be mistaken for passion, Calvo, guided by the persistent shouts of the street musician on the corner, enters a house in Colonia Roma, where he finds the naked body of a young girl. Despite having solved two cases, for Calvo, the girl’s dilemma is just another accident in Mexico City—an issue belonging to someone else that he prefers not to get involved in, especially now that his firm, Calvo Abogados, has a steady flow of clients and various cases keeping the business and his life afloat.
But another related crime, now with an undeniable proximity, prompts him to reflect, and against his own battered principles, he decides to investigate. More than just taking on the case, the problem consumes him, yet tracking down clues proves difficult. It is only through the fortuitous involvement of a neighbor and the mysterious appearance of a politician from the old guard that Calvo begins to piece together his investigation—one, he is told by his neighbor, that is tied to an ancient legend from Greek mythology.