The Quest to Tarquin’s Tomb is a quest undertaken by Apollo, Meg McCaffrey, Hazel Levesque and Lavinia Asimov to find and locate Tarquin’s Tomb to give the Twelfth Legion Fulminata a fighting chance against the forces of Triumvirate Holdings.
During the funeral of Jason Grace, Lupa and her wolves arrive and the she wolf asks to speak with Apollo alone. She tells him that in order to give the legion a fighting chance and to start to regain his godhood, he must find Tarquin’s Tomb.
The following morning a senate meeting is held and after deciphering a prophecy, it is discovered that the tomb is located under a merry-go-round in Tilden Park by Wildcat Drive, Apollo, Meg, and Lavinia are selected to go under the leadership of Hazel.
They set out at sundown and enter the tomb to see Tarquin discussing battle plans about teaming up with Commodus and Caligula. He then reveals he notices the four and a fight breaks out. The two sides class and the fighting ends when the daughter of Pluto collapses a wall on Tarquin. They flee and the girls carry Apollo, who is slowly being consumed by zombie poison. Soon the daughter of Demeter creates a latter out of tree roots for them to escape. When they reach the surface and hear others coming after them, the daughter of Terpsichore leaves to hold them off while the others head back to Camp Jupiter.