Eight horror-loving friends fight for their lives when a killer clown who seems to know the grim secret they share begins to pick them off, one by one.

In a present-day Spain, divided and on the brink of political chaos, inquisitive millennial investigative reporter Antonia stumbles on a decades-old conspiracy: the existence of a cryogenically frozen super-agent, García, created in a laboratory in the 1950s by General Franco’s fascist secret services. The old-world collides with the new as García and Antonia must learn to work together as they are drawn deeper and deeper into a political conspiracy that threatens to overthrow democracy and plunge Spain back into brutal dictatorship.

Each morning, whatever the day, four friends meet at a bar to have some beers and fix the world their own way, by criticizing and ranting against everything and everyone. They have something in common: they are all unemployed. Well, all but one.

Max is a Jack Russell dog genetically modified for criminal purposes so he is able to talk. Running away from the criminals he's working for, he is wounded, then saved by detective-wannabe Alberto, who is fire and house-hunting. They end up staying with Alberto's sister-in-law Marta and her two children. Thanks to them all, Alberto finally manages to be a detective, and he and Max establish their detective agency: Sabuesos.

In the 14th century, Barcelona is experiencing one of its most prosperous moments. The city has grown to La Ribera, a fishing district in which the largest Marian temple ever known is built: Santa María del Mar. But the construction runs parallel to Arnau Estanyol, a serf of the land who, fleeing the abuses of The feudal lords of the countryside take refuge in Barcelona.