Libby Day was seven when her family was murdered: she survived by hiding in a closet - and famously testified that her older brother Ben was the killer. Twenty-five years later the Kill Club - a secret society obsessed with notorious crimes - gets in touch with Libby to try to discover proof that may free Ben.

Almost broke, Libby agrees to go back to her hometown to investigate - for a fee. But when Libby's search uncovers an unimaginable truth, she finds herself right back where she started: on the run from a killer.