With her life back in London falling apart, Olivia cannot believe her luck when she's invited on a once-in-a-lifetime Antarctic cruise with her boyfriend, Aaron.

Olivia has never been anywhere so spectacular: huge cliffs of ice loom high on the horizon, penguins dive through the sparkling sea, and above it all, the sun never sets in the eerie twilight sky.

And then Aaron disappears. And a body is discovered on board.

Surrounded by strangers, Olivia has no idea who she can trust.

And if she can't figure it out soon, she won't make it back alive...