Every school has its secrets—but at the exclusive Ellison College, the past might prove deadly—in this twisty puzzlebox mystery perfect for fans of Maureen Johnson's Truly Devious series.

THIRTY YEARS AGO: three students walked into the woods surrounding Ellison College, and only one came out. They became known as the Mischief Girls, and their case was never solved.

HALLOWEEN WEEK, MODERN DAY: Ellison freshman Raina isn’t interested in digging into the past. To combat her personal demons, she volunteers at Night Walk, a campus program dedicated to helping students get home safely. Until one night, Raina escorts a fellow freshman to her dorm...only to learn that the girl disappeared before she ever made it through the door.

NOW: With the help of the missing girl’s stepbrother, Raina begins to investigate. But when the pair of them discover that she’d been looking into the Mischief Girls murders prior to her vanishing, the case suddenly becomes much more complicated.

From professors’ offices to state penitentiaries, Raina relentlessly hunts down the truth. But if she wants to find it, she’ll have to accept that maybe what happened to the missing girl didn’t begin the night she disappeared.

Maybe it all started thirty years ago, in the woods.