Albert Whalen, a hotel elevator operator, together with one of the pretty chambermaids, Annie Jackson, on the hotel staff are accused of breaking and entering a suite belonging to one of the guests, Mr.
Old timer Hank Robbins and his young pal,"Red" Hepner ride into the town of Cajon, Mexico and find it under a reign of terror imposed by a mysterious outlaw known as El Lobo.
Based on a story by Michel Linsky, "Adieu, Mascotte" revolves around an artist's model named Mascotte (Harvey) who ekes out a hand-to-mouth existence in the Parisian art colony.