Jamie Grant discovers he has ceased to exist and must team up with a mysterious girl to fix tears in time before a sinister entity unravels history. Jamie Grant initially believes he is being ignored by everyone around him, from his teacher to his mother, with only his sister Ellie seeming to notice him. He soon realizes he has fallen through a time break and is living in a parallel world where he was never born. Aided by Anna, he learns he can control time and is recruited as a Time Runner to repair temporal anomalies. Their mission is to thwart the malevolent Darkling Midnight, who seeks to sow chaos throughout history and prevent the collapse of time itself.

The premise sets up a classic young adult science fiction adventure with a strong focus on time travel and parallel universes. The narrative appears to center on a young protagonist grappling with an extraordinary existential crisis, which is a common and engaging trope in the genre. The introduction of a mysterious ally and a clear antagonist suggests a plot driven by action and a race against time. The theme of controlling time and preventing historical chaos points towards a story that balances personal stakes with large-scale consequences.