Antonia Scott is the most intelligent woman in the world –a virtue and a curse at the same time. Her intelligence allowed her to become the "Red Queen" of a secret experimental police project. But a personal tragedy removed her from active duty. Now, Jon Gutiérrez, a police officer in trouble, has to get her out of her seclusion to solve a case that will put her abilities and her past to the test.

Jon and Antonia get back together. The Queen and her squire have little time left and must go to underground tunnels riddled with traps and bombs. Sandra and Ezequiel are waiting for them and the lives of Jorge and Carla are at stake. But Antonia knows this is not over. Sandra is not who she says she is, but just a prophet of someone more powerful who already destroyed what Antonia loved most.