In the isolated and enigmatic farmhouse of São Pedro, a dark past intertwines with the present. Tomás, a young man marked by childhood traumas, returns to the ancestral home he has always feared, only to discover that the forest surrounding him holds unsettling secrets and echoes of an ancient cult. When his dog Max mysteriously disappears, Tomás embarks on a desperate search to rescue his friend while being haunted by whispers of a past that has never truly been buried.

With the help of Dr. Helena, a veterinarian with her own emotional scars, and Carlos, a hesitant lifelong friend, Tomás confronts the dark forces threatening to take over their lives. But what should have been a rescue transforms into a struggle for sanity as disturbing revelations about sacrifices, rituals, and an ancestral seal shatter their perceptions of reality.

As the trio delves deeper into the depths of the forest, they encounter a malevolent entity that feeds on their worst fears, turning every shadow into palpable terror. The line between sanity and madness begins to dissolve, and the true essence of "The Seal"—a mark of commitment and desperation that connects their fates—becomes revealed.

In a race against time, they must confront not only the cult that pursues them but also the echoes of their obligations and regrets. Can love and loyalty seal the keys to freedom, or will the cost be higher than they are willing to pay?

"The Seal" is a story of deep psychological horror, where the true terror lies not only in the shadows of the forest but within each character, challenging them to break the chains that bind them.