When retired family doctor Sam Moore gets a call from the coroner to come to The Twin Sisters Inn to consult on a murder victim, he's puzzled. Why would Lou call him? He's retired now, and just wants to spend time with his beloved Rachel, his grandsons, and to work in his gardens.

Within days, the body count increases and Sam is a prime suspect, so he calls on a peculiar talisman-his brother Billy's glowing green marble-to whisk him back in time in search of clues before the killer strikes again.