"The Tower" is a crime drama based on the first part of Kate London's novel series. A tragedy occurs in the southeast of London - a police officer and a teenage girl fall from a high-rise building. On the roof, there are a five-year-old boy and a young police officer named Lizzie Griffiths. Several hours later, Lizzie disappears, and now the investigation falls on the shoulders of Sergeant Detective Sarah Collins. The heroine not only has to find her colleague but also uncover the truth about these horrific events.