The Secret Legion is a thousand-year old worldwide organisation in charge of solving natural and supernatural mysteries. Its members are scientists, artists, inventors, people with special talents disposed to leave a common life to work in the background. Becoming a Legionnaire could be either a honour or a curse. This is the story of River who comes across the Secret Legion at the age of 18. It is the tale of his most important and dangerous mission which will involve his family, his best friend, and some Legionnaires coming from the past to foil a threat unknown to the rest of the world. This is the first of five books about the Secret Legion's members.