When Charlie's grandmother is killed, she is plunged into the world of the Temporal Sinistrum. An organisation of time travellers that maintain the historical timeline. Her grandmother used to be a star agent and Charlie must solve her murder, in an adventure that takes her from 1966 Australia to a post-apocalyptic Los Angeles. This is a coming-of-age story that spans centuries as Charlie investigates the Sinistrum, while still dealing with her feelings for the boyfriend she left behind.