Two cold cases. A series of phenomenal events. A race against time.

Over the span of two years (and counting) there have been reports hitting the media of increasingly strange events: from rivers altering their natural course to phantom inheritances – and a war veteran who'd lost a limb one day waking up to find their limb regrown. Is this a cosmic joke? A hoax – or a swindle?

When a simple muse causes the Declaration of Independence to be wholly rewritten – an intervention is crucial.

Carter and Stella have no choice: the call to action has been announced. The long-running events pique Stella's interest. It's her field specialty – and as they get to work peeling back the timelines, they find themselves tracking down an ancient artifact that can assume many forms – the last definitive account of its use was almost five thousand years ago.

In this frantic search for clarity, can Carter and Stella find the links between this ancient relic and the recent events before the world ignites?

Time will only tell – and it is breathing down their necks.