When Billie is released from a correctional facility in Decatur, her sister Rhiannon is there to meet her. Painful secrets and unspoken betrayals linger between them - but most agonizing is the sudden passing of their mother, a renowned paleontologist. Rhiannon and Billie set off on a road trip following the breadcrumb-trail of their late mother's scavenger hunt, a sort of second funeral she planned in her final days. They know it will end in Utah at the Cleveland-Lloyd Quarry, where she spent her career researching dinosaur fossils. But the seemingly endless days on the road force the sisters to confront their hostilities and revisit memories both good and bad.