Using a sinister symphony, Manyfaces, the malevolent, malicious master of a million monstrous disguises, lulls Big City asleep, allowing him to strip it clean. Donning earmuffs, Blue Falcon and Dynomutt plan a trap, but Manyfaces avoids it when he and his henchmen impersonate Chief Quimby, the Mayor, and B.F.. Dog Wonder, unfortunately, apprehends the real B.F., mistakenly believing he has Manyfaces in disguise. Through touching Dynomutt's one ticklish spot (he's the only one who knows where it is), Blue Falcon manages to finally convince Dynomutt he's the true B.F. and together they pursue the real Manyfaces and his creepy cronies, who at this time are driving down the street in a dumptruck piled high with stolen loot. Manyfaces again tries to confuse D.W. by his B.F. disguise, but this time Dog Wonder picks his true blue buddy and Manyfaces is arrested.