In 1898, Sherlock Holmes and Doctor Watson travel to Germany to investigate a strange case in the village of Darmstadt near castle Frankenstein.

Alice has lost her father and one leg in a car accident. She lives with her mother (Jeanne) and grandfather in a farm. Summer holidays start and she can't go to the sea with other children of the village. Then she meets Vincent, a younger boy who stayed in the village as well, and Alain, the mayor's son who's back in town to train his athleticism female club. Alice would like to run with her prosthesis but Jeanne doesn't want her to run nor to approach Alain.