Callie is a marine biologist who lives in Whaletown. She helps Ruth by analyzing the age of the barnacles on the freezer bag that Ruth finds on the beach, and she tells Ruth that the freezer bag and lunch box were most likely in the ocean even before the Japanese tsunami of 2011. Ruth is disappointed by this information, as she was attached to the theory that the tsunami washed the freezer bag and its contents were washed from Japan to her island.