On a snowy February morning, the body of 25-year-old journalist Alice Salmon washes up on a riverbank south of London. Professor Jeremy Cooke, who taught Alice, embarks on a final project --- a book documenting Alice’s life through the digital and paper trails that survive her. Bit by bit, the real Alice --- a complicated and vulnerable young woman --- springs fully formed from the pages of his book…along with a labyrinth of misunderstandings, lies and secrets that cast suspicion on everyone in her circle --- including Jeremy himself.