<p>Thomas,thefatherof12-year-oldPaul,hasdisappearedwithoutatraceforayearnow.WhentheboyandhisbestfriendMaxspendthesummerholidaysontheSwabianAlb,thetwotrytoinvestigatethedisappearanceofPaul'sfather.Todothis,theywanttofindalegendarycavethatThomasstudied.Buthisnoteshavetobedecipheredfirst.Theyalsohavetodealwithwildan...</p>
