On the rocky coast of Cornwall, a young woman named Mary moves to the unsettling inn run by her uncles, who seem to harbor a dark secret. Drawn by the mystery surrounding Jamaica Inn, Mary discovers that her family is involved in smuggling and piracy. The inn, a refuge for brave yet shadowy men, becomes the setting for intrigues, betrayals, and imminent dangers.
As Mary tries to adjust to life at the inn, she encounters a series of chilling events that lead her to cross paths with the charismatic yet dangerous Joss Merlyn, her uncle and leader of a group of criminals engaged in making ships disappear along the coast. Driven by her courage and determination, Mary confronts the secret surrounding her home and her connection to Joss, who soon becomes intrigued by her indomitable spirit.
Caught between familial duty and her desire to do what is right, Mary embarks on a perilous adventure with the mysterious and handsome police captain, who seeks to dismantle the smuggling operation. With intrigue and a dark backdrop at every turn, danger lurks around every corner as Mary faces difficult decisions and uncovers the truth about Jamaica Inn and her own bravery, all while trying to find her place in a world where loyalty and survival are everything.