Sara Chae is the founder of One Last Word, an app that allows you to send a mes?sage to anyone you want after you pass. Safeguards are in place so the app will only send when you?re definitely, absolutely, 100% dead, but when another Sara Chae dies and her obituary is posted online, Sara discovers that drafted messages she had drunkenly uploaded on one night have been released ?one each to her emotionally charged mother, to her former best friend who ghosted her, and to her unrequited high school crush, Harry Shim.