The Trials of Apollo is about the sun god Apollo, who is cast down to Earth from Olympus due to his fatal mistake amongst the gods, causing war between the Romans and the Greeks. His descendent Octavian was assumed to be of an Oracle, able to foretell the future before it happens. This causes a war between the two camps, Camp Jupiter, the legion and the Romans and Camp Half-Blood, the Greeks. Apollo is blamed for Octavian's mistakes and must earn his right back to Olympus and his right to the council among the twelve Olympians.