▁repeatedly . ▁After ▁an ▁attack ▁by ▁the ▁pir ate ▁captain ▁chairman , ▁which ▁they ▁narrow ly ▁escape , ▁Jim ▁and ▁Gran ▁in cap ac itate ▁Silver ▁and ▁his ▁crew ▁with ▁their ▁own ▁sleep ing ▁pot ion . ▁ ▁Just ▁before ▁reaching ▁the ▁island , ▁however , ▁a ▁storm ▁r ips ▁the ▁ship ▁apart ; ▁Jim , ▁Gran , ▁Bab oo , ▁and ▁the ▁baby ' s ▁self - app oint ed ▁guard ian , ▁the ▁wal rus ▁Otto , ▁arrive ▁just ▁after ▁Silver , ▁his ▁crew , ▁and ▁Kath y , ▁now ▁a ▁prisoner ▁of ▁the ▁pir ates . ▁In ▁exchange ▁for ▁her ▁friends ' ▁safety , ▁Kath y ▁offers ▁to ▁lead ▁Silver ▁to ▁the ▁exact ▁location ▁of ▁the ▁tre asure . ▁Silver , ▁however , ▁plans ▁on ▁double - cross ing ▁both ▁Jim ▁and ▁his ▁own ▁crew ▁to ▁get ▁the ▁tre asure ▁for ▁himself . ▁ ▁While ▁Otto ▁holds ▁off ▁his ▁fellow ▁pir ates ▁( who ▁soon ▁surrender ▁after ▁real izing ▁that ▁Silver ▁wouldn ' t ▁share ▁with ▁them ▁anyway ), ▁Jim ▁ch ases ▁after ▁Silver ▁as ▁he ▁and ▁his ▁mon key ▁hel ms man , ▁Spider , ▁are ▁clim bing ▁towards ▁the ▁top ▁of ▁an ▁ext inct ▁vol cano ▁where ▁the ▁tre asure ▁is ▁hidden . ▁In ▁the ▁end ▁Kath y ▁sacrific es ▁the ▁final ▁secret ▁of ▁recover ing ▁the ▁tre asure ▁to ▁save ▁Jim ' s ▁life , ▁but ▁it ▁does ▁no ▁good ▁to ▁Silver ; ▁the ▁mechanism ▁he ▁is ▁told ▁to ▁trigger ▁does ▁not ▁reve al ▁the ▁tre asure