Annabeth reunites with Percy and they are willing to take Percy home.
They all have dinner while Reyna explains the Prophecy of 7 that needs to be solved soon. She also explains to Annabeth that finding the Mark of Athena ( Athena Parthenos) is also a part of reuniting the 2 seperated colonies, the Greek and the Romans. She also brings out the fact that Nico is dying in the underworld.
After they had dinner, everyone went to do their own thing. Meanwhile Leo accidently fired from his new built ship , the Argo II. This caused chaos between the Greek and Romans and the Romans were heading for war.
The ship had been damaged. Therefore they decide to land at Great Salt Lake. The 7 decide to split up in groups to get the equipment they need. Hazel and Leo go to a place near the Great Salt Lake, while Frank will help Percy and Annabeth by flying them down to Fort Sumter in Charleston.