《太空狗：热带冒险》WhenamysteriousanddangerouswhirlpoolphenomenonappearsinthetropicsoftheAtlanticOcean，BelkaandStrelka，thefirstastronautsontheirwaybackfromamissiontoSaturn，aresenttoinvestigate.Astheyventuredownintotheswirlingoceandepths，theydiscoveramysteriousUFOattemptingtostealallofEarth'swater.Withthehelpoftheirgoodfriends，BelkaandStrelkaonceagainperformaheroicmissiontosavebothourplanetandthedistanthomeoftheirnewalienfriends。