"The Girl Before" is a British mini-series that tells the story of a young woman named Jane, who lost her child some time ago. Despite the tragedy she has endured, the heroine is determined to start afresh. She hopes that the house, which will be designed for her by the renowned and eccentric architect Edward Monkford, will allow her to take the first step towards a brighter future. However, Jane soon discovers that the house holds its own secrets, and she is not its first occupant.