Teenager Minty expects to spend a quiet holiday near historical Belton House with her mother`s godmother, "Aunt" Mary. However, soon after leaving Minty, her mother is involved in an accident and lies comatose in the hospital. Distraught, Minty begins wandering the Belton grounds. When she touches the sun-dial/moon-dial in the garden, she is transported through time. First to the late 19th century where she meets Tom, a sickly and abused servant. Second to the 18th century where she meets Sarah, a mysterious cloaked child who is in danger. Can Minty find away to help these ghosts of the past?