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TheBoxcarChildrenhavebeenchosentoplayinanexcitingnewgameshowAcameracrewisfollowingtheAldensaroundthecityofPhiladelphiaastheycompetewithanotherbrother-and-sisterteaminasearchforclues.Thesearchisn'teasy,though,especiallywhensomeonehastamperedwiththeAldens'mapandstolenoneofBenny'streasuresWhyistheirteambeingsabotaged?