On the morning of April 18, 1906, Cora wakes up early and walks down to the San Francisco docks, hoping her father has returned with money. Ever since the family’s mine was closed for unsafe conditions her family has struggled to eat and to buy medicine, and now Cora is being pursued by a shadowy gang of debt collectors. But things are about to get much worse, as an earthquake destroys the city, trapping Cora inside a buried ship along with a Chinese girl, Chi.