Centers on a teenage Hardin, who is navigating his first love.

TwosisterslivingseparatelivesondifferentcontinentsarereunitedonaMediterraneanIsland.ThetwobarelyhavetimetobondandrevivefamilytiesasKate,theelder,meetsagroupoflocalsandagreestoanexcitingrideonahotairballoon.Butdisasterstrikesandastheresultofafreakaccident,theballooniscarriedfarouttosea.Theircellphonesoutofrange,andtheballoonrunningoutofgas,Kateandherfriendsarebattlingfortheirlives.While,backonland,theyoungersister,Liz,hasbecomeanunwanted"materialwitness"toacrime.Mattersthentakeadramatictwist,onethatwillmarktheirlivesforever.

全心付出的母亲深信女儿在这场凶杀案中是清白的，但她很快发现令人不安的真相，而受害者与施害者的边界也开始变得模糊起来。