TwosisterslivingseparatelivesondifferentcontinentsarereunitedonaMediterraneanIsland.ThetwobarelyhavetimetobondandrevivefamilytiesasKate,theelder,meetsagroupoflocalsandagreestoanexcitingrideonahotairballoon.Butdisasterstrikesandastheresultofafreakaccident,theballooniscarriedfarouttosea.Theircellphonesoutofrange,andtheballoonrunningoutofgas,K ateandherfriendsarebattlingfortheirlives.While,backonland,theyoungersister,Liz,hasbecomeunwanted"materialwitness"toacrime.Mattersthentakeadramatictwist,onethatwillmarktheirlivesforever.