In this haunting tale of past and present, Garth uncovers the secret to longevity, and the mystical power of love

On assignment to interview the oldest people on the planet, historian Garth Hellyer meets Marged Brice, a spirited woman who claims to be 134 years old. Upon their first meeting, Marged insists that she is ready to die, but the mysterious Perdita is keeping her alive. She entrusts Garth with her diary, which connects him to the late 1890s and to Perdita, a supernatural presence who gives the gift of love.

When Garth falls for the beautiful art historian Claire, Marged gives Perdita to him, but in order to be truly fulfilled, he must first make himself worthy of the gift...