Trudy Peterson is forced to move to the country with her mother after her grandfather's death. A normal twelve-year-old girl, she has no idea she is about to embark on the biggest adventure of her life. When Trudy discovers The Secret of Ellis Meadow with the aid of a map, an ancient timepiece, and the help of her two best friends, she travels through time to prevent something dreadful from happening. What Trudy doesn't realise is that by following her grandfather's wishes, she not only changes events in the present, but drastically alters the future.