While the officers are in hospital, Williams posts a concert party in the jungle but is forced to bring the officers back to stage a special performance.
The concert party is sent to the palace of the Maharajah of Bharatpur to protect him.
The concert party try to protect and stop the attempts on the life of the Maharajah of Bharatpur.
Battery Sergeant-Major Williams has a problem - how to make the Concert Party drill like guardsmen. Only a miracle can help!
Sergeant-Major Williams's life is threatened by a dreaded Chinese secret society, the Black Scorpion Tong.
The Concert Party may lose their pianist, can they carry on?