Bárbara de Braganza is preparing for her voyage from Argentina to Mexico, but first, Eva is tasked with assisting undercover agents in locating a man who possesses a dangerous virus.

A grave offense aboard the vessel prompts Fabio to caution Eva that their undertaking is growing perilous. Carolina finds herself drawn into the unfolding enigma.

With each new crime, Eva’s connection to the events becomes increasingly suspect. Fabio’s apprehension toward Carolina deepens. A growing unease settles over the crew, casting doubt upon the captain's leadership.

Upon Fabio’s arrest, Eva desperately seeks a photograph of Steve. Meanwhile, within the confines of the prison, Carmen’s fellow inmates plot a daring escape.

Verónica sought assistance for the woman with bandages, who was traveling with Carmen. Nicolás pondered the reason for the Bárbara de Braganza's altered course. Fabio questioned Ayala.

As the virus began its inexorable spread, the Bárbara de Braganza faced a confluence of challenges. Simultaneously, the ship's passengers and crew sought a vaccine, while the vessel itself was beset by difficulties on several fronts.