A librarian's summer archive project turns deadly when the retired professor helping her is murdered at the college's annual celebration.

Diana Foster thought digitizing historical documents would be a peaceful summer project at Moonridge College. But when Professor Emeritus Harold Blackwood collapses at the Founders' Day garden party, what appears to be a heart attack quickly becomes a murder investigation that threatens to expose decades of institutional secrets.

Harold had been helping Diana organize the college's archives while secretly documenting years of academic cover-ups for his explosive memoir. When toxicology reveals he was poisoned with his own heart medication, Diana realizes someone was desperate to silence his research on institutional accountability forever.

Partnering with Detective Scott Erickson and her student assistant Emma, Diana discovers Harold had been receiving anonymous threats about his memoir project. His meticulous documentation reveals a pattern of buried scandals, protected donors, and sacrificed whistleblowers spanning twenty years of college history.

As suspects emerge from Harold's past?including his estranged daughter, colleagues threatened by exposure, and administrators protecting institutional reputation?Diana must navigate family secrets, professional rivalries, and the dangerous intersection of academic politics and personal ambition.

But when Diana becomes the keeper of Harold's explosive research, she realizes the killer won't hesitate to strike again to keep the past buried. In a case where accountability becomes a motive for murder, Diana must decide whether some truths are worth dying for.

The third installment in the Moonridge Library Mysteries proves that even in academia, the deadliest secrets are often hidden in plain sight.