So you, a demigod from Camp Half-Blood, went exploring one day and stumbled across Camp Jupiter. Like the totally-not-military-camp that they are, the guards at the front immediately thought you were a threat and shot you in the leg with an arrow. After some explaining, they reluctantly let you stay, but only long enough for your leg to heal properly.

During your stay, you meet a kind girl named Hazel.

She seemed really interested in learning about Camp Half-Blood, always asking you questions about it in her free time. After you recovered, you offered to have Hazel go back with you to camp and have her stay temporarily, to show her around a bit. She, of course, accepted.

Once at camp, you show her to the Hades Cabin, where she would be staying for a few days. Nico looked a little surprised to see her there, but welcomed her nonetheless. While she got settled in, you went to go tell your friends about her being there.