, ▁and ▁go ▁to ▁rescue ▁him . ▁Although ▁they ▁successfully ▁free ▁the ▁son ▁of ▁H ades ▁and ▁locate ▁the ▁statue , ▁An nab eth ▁and ▁Per cy ▁are ▁pulled ▁into ▁T art arus ▁and ▁the ▁rest ▁of ▁the ▁group ▁resol ves ▁to ▁find ▁some ▁way ▁to ▁save ▁them . ▁ ▁The ▁House ▁of ▁H ades ▁ ▁In ▁T art arus , ▁Per cy ▁Jackson ▁and ▁An nab eth ▁Ch ase ▁travel ▁towards ▁the ▁" Do ors ▁of ▁Death " ▁( the ▁only ▁exit ▁to ▁the ▁mort al ▁world ) ▁with ▁help ▁from ▁Bob ▁the ▁T itan , ▁hoping ▁to ▁escape ▁and ▁simultaneously ▁stop ▁more ▁mon sters ▁from ▁getting ▁through . ▁In ▁the ▁mort al ▁world , ▁the ▁remaining ▁dem ig ods ▁search ▁for ▁the ▁mort al ▁side ▁of ▁the ▁Do ors ▁to ▁help ▁open ▁them . ▁They ▁also ▁meet ▁with ▁Re yna ▁Av ila ▁Ram í rez - A rell ano , ▁a ▁Roman ▁dem ig od ; ▁she , ▁N ico ▁di ▁Ang elo , ▁and ▁Co ach ▁H edge ▁leave ▁with ▁the ▁Ath ena ▁Par then os ▁for ▁Camp ▁Half - B lo od . ▁Once ▁reun ited , ▁the ▁original ▁seven ▁sail ▁for ▁Greece , ▁where ▁they ▁expect ▁Ga ia ' s ▁main ▁force ▁will ▁gather . ▁ ▁The ▁Blood ▁of ▁Olymp us ▁ ▁While ▁Re yna ▁Av ila ▁Ram í rez - A rell ano , ▁N ico ▁di ▁Ang elo , ▁and ▁G le es on ▁H edge ▁travel ▁towards ▁Camp ▁Half - B lo od ▁( where