After his mom's funeral, Grandma Zhang sends Frank south to find Camp Jupiter. He leaves the city and journeys down to San Francisco, where he eventually finds the camp. A month later, Frank returns with Percy Jackson and Hazel Levesque to see Grandma Zhang during their quest to free Thanatos. After spending the night, the three flee from Laistrygonian Giants and the Zhang family mansion is destroyed in the resulting battle. The trio manages to escape the city with the aid of a retired member of the Twelfth Legion, who flew them away by plane.