Inthefourthseason,SisichallengesthebestjockeyinBavariatoagrandhorseracetosavethefamily’sestate,CastlePossenhofen,afterthedeathofherfather.Backinherhomeland,shecomesacrossdarkfamilysecretsandultimatelymustaskherselfwhereshereallyfeelsathomeddd