A year ago, Katrina Berg was a rising star at an AI start-up, married with an adoring husband. Then Jason was killed in a car crash. Her most prized possession is the prototype for a new chatbot loaded onto her phone. The contents of Jason's email, social media, pictures, and every bit of data she could find were loaded into the bot, and Katrina has "talked" to him every day for the past six months. One day, she taps out: Tell me something I don't know. The reply: I think I was murdered. Distraught, Katrina must navigate grief and the complex questions of how much control technology has. And staying alive long enough to do that is more difficult than she dreamed.