▁him ▁in ▁being ▁a ▁war rior . ▁Gu il bert ▁rep lies ▁that ▁Arn ▁is ▁not ▁meant ▁to ▁be ▁a ▁mon k ▁but ▁is ▁dest ined ▁to ▁be ▁a ▁soldier ▁of ▁God . ▁▁ ▁When ▁Arn ▁leaves ▁the ▁monaster y ▁and ▁returns ▁to ▁his ▁family , ▁he ▁is ▁soon ▁pulled ▁into ▁the ▁struggle ▁between ▁powerful ▁families ▁fighting ▁for ▁the ▁crown ▁of ▁V ä stra ▁G öt aland . ▁He ▁helps ▁his ▁friend ▁Kn ut ▁Erik sson ▁to ▁kill ▁the ▁old ▁king ▁Karl ▁Sver k ers son . ▁This ▁leads ▁to ▁war ▁between ▁the ▁two ▁fa ctions . ▁Arn ▁and ▁his ▁f ian c ée ▁Cec ilia ▁Alg ots dot ter ▁are ▁ex communic ated ▁for ▁pre mar ital ▁relations ▁and ▁f als ely ▁accused ▁of ▁having ▁relations ▁with ▁Cec ilia ' s ▁sister ▁( in ▁reality ▁a ▁plot ▁to ▁hurt ▁Kn ut ) ▁and ▁forced ▁to ▁undert ake ▁twenty ▁years ▁of ▁pen ance , ▁Cec ilia ▁in ▁a ▁convent ▁and ▁Arn ▁as ▁a ▁Knight ▁Tem pl ar ▁in ▁the ▁Holy ▁Land ▁to ▁fight ▁against ▁the ▁Sar ac ens . ▁Cec ilia ▁gives ▁birth ▁to ▁Arn ' s ▁son ▁but ▁the ▁son ▁is ▁taken ▁away ▁from ▁her ▁and ▁she ▁only ▁he ars ▁of ▁his ▁surv ival , ▁and ▁name ▁of ▁Magn us , ▁through ▁another ▁woman ▁who ▁is ▁also ▁named ▁Cec ilia , ▁the ▁future ▁queen ▁of ▁Sweden , ▁Cec ilia ▁Bl anka . ▁ ▁While ▁purs uing ▁a ▁band ▁of ▁th ieves , ▁Arn ▁comes ▁across ▁the ▁enemy ▁of ▁all ▁Christ end om