The Midnight Hour is set in London's Notting Hill in 1998, where mother Dee Dee suddenly disappears after going out one evening, leaving behind her teenage daughter Maggie and young brother Kit to face a desolate void and unanswered questions. Maggie refuses to believe her mother is gone forever, but she finds herself forced to take on the responsibility of the house and care for her brother, in a desperate attempt to protect family secrets from the eyes of the press and authorities.

Amidst this turmoil, "Wolf" appears in her life, a mysterious boy from the fringes of Portobello, where dark alleys and antique shops abound. There, far from the gleaming white facades, Maggie discovers another world that gives her a fragile sense of security, but dangers multiply, time passes, and an impossible decision looms.

Twenty years later, when the new owner of the family home begins digging into the old house's basement, buried secrets resurface, intertwining the threads of the past with the present in a thrilling narrative that blends mystery, family drama, and psychological suspense.