ThebooktellsthestoryofthequestforCaptainGrantoftheBritannia.AfterfindingabottlecastintotheoceanbythecaptainhimselfaftertheBritanniaisshipwrecked,LordandLadyGlenarvanofScotlanddecidetolauncharescueexpedition.Themaindifficultyisthatthecoordinatesofthewreckagearemostlyerased,andonlythelatitude(37degrees)isknown. LordGlenarvanmakesithisquesttofindGrant;togetherwithhiswife,Grant’schildrenandthecrewofhisyachttheDuncantheysetoffforSouthAmerica.AnunexpectedpassengerintheformofFrenchgeographerJacquesPaganeljoinsthesearch.TheyexplorePatagonia,TristandaCunhaIsland,AmsterdamIsland,AustraliaandnewZelandandfindCaptainGrantatlast.