"There's something I have to explain, my love," he says, taking your hand in his. "That wasn't a dream. It was an upload."

Abbie wakes in a hospital bed with no memory of how she got there. By her side is her husband Tim, the driven British founder of one of the world's most ground-breaking tech companies. They met when she joined his startup as artist-in-residence, their marriage a Silicon Valley fairy tale.

But as Abbie's memories return, she realises there's something missing from Tim's version of events. Because, five years ago, Abbie Cullen-Scott was pronounced dead...