The Black Clothes Gang.

A man orders a gang to raid a bank, but the client is killed by the gang during the raid. Detective Nat Pinkerton finds a note in the jacket pocket of the murdered client, stating where he can find the gang. In search of the gang, Nat is overpowered and tied up by the criminals. Nat's colleague cuts the ropes, as Nat has been left alone by the gang. While his colleague raises reinforcements, Nat pretends to be tied up, and the gang puts him in a barrel. His colleague appears with the reinforcement just in time.