主演：John Hawkesworth David Burke David Gwillim
导演：Alan Grint
简介：AnunknownthiefstealsanimportantnavaltreatyfromtheofficeofMr.PercyPhelps,aForeignOfficeclerk.Phelps'sdistressgiveshimabrainfeverthatlastsfornineweeks.Ashebeginstorecover,hewritestohisoldschoolmate,Dr.Watson,begginghimtoinviteSherlockHolmestoinvestigatethematterandfindthetreaty.Otherwise,hishonorandhappinessaregoneforever.Holmestakesupthecasewithzest,butgivesPhelpsnofalsehopes.Themysteryisasdarkandtangledasanyhehasknown.