Vincent wakes up in an apartment in New York City with no recollection of having arrived there. Back in the UK, his girlfriend, Emily, has been murdered. Guided by mysterious phone calls which lead him to a series of clues, he soon suspects he has travelled to New York to find Emily's killer. Meanwhile, an explicit video Emily made is going viral. When she shared it with Davison in a private forum, she never expected him to upload it. But she's only ever spoken to him online, and he might not be who he says he is.