Following a brutal attack, Kate makes the uncharacteristically bold decision of moving from London to Boston, in an apartment swap with her cousin, Corbin Dell. But after her arrival Kate makes a shocking discovery: Corbin's next-door neighbour, Audrey Marshall, may have been murdered. Far from home...

Following a brutal attack, Kate makes the uncharacteristically bold decision of moving from London to Boston, in an apartment swap with her cousin, Corbin Dell. But after her arrival Kate makes a shocking discovery: Corbin's next-door neighbour, Audrey Marshall, may have been murdered. Far from home and emotionally unstable, who can Kate trust?