Dominic's life takes place predominantly in the corridors of a police station. Without fear, she accepts challenges of any nature, as long as they involve capturing criminals. However, an unexpected event turns Dominic's world upside down when she receives an order to collaborate with the FBI. The one who brings this order is her older brother, Allan, who she always imagined as a calm veterinarian, turning out to be something much more than that. The surprise doesn't stop there: Dominic discovers that she will have to collaborate with Ethan, a bossy, sexy and explosive man, whose aversion to partners is evident at first glance.

Now, they face the challenge of learning to tolerate each other before their coexistence becomes unsustainable, or worse, before the criminals take the initiative to solve their problem once and for all.