After the perilous Battle of Peculiardom was won and the Wights were finally defeated, many peculiars thought it right of them to assume that the worst was behind them, Wights and Hollowgast were gone forevermore. Just as Miss Peregrine and the Peculiars finally get a glimpse of normal life, something goes badly wrong and everything that the peculiars have dreamed of since life on Cairnholm is put to a standstill. New faces meet old faces in an attempt to save something they thought they already had. ***Takes place after Library of Souls***

Hadley Jamison doesn't know what to think when she hears that her classmate, Archer Morales, committed suicide. She didn't exactly know him, but that doesn't stop her from feeling like there was something she could have done to help him. So to Hadley's surprise, on the very night of Archer's funeral, she has a run in with Death himself and is offered the chance to go back in time to stop Archer from ending his life. The catch? She only has twenty-seven days to do it. And if Hadley doesn't succeed? Well, she doesn't want to think about that.