Helena knew that leaving London was not a good idea. But she had no idea what kind of test awaited her family. The girl's father got a job as a clock keeper in Mr. Westcott's house and signed a terrible agreement: if even one clock stops, their family will lose all their property! Who knew that there were more than a hundred clocks in the house?! Helena doesn't understand why Mr. Westcott is so afraid that his watch will lose its power? She also finds strange drawings all over the house. And she also thinks that someone is watching her...