Keith and Dan witness a mugging on the number 22 bus. Hoping to get back into their wives' good books, they attempt to tackle the masked muggers themselves. Unfortunately, obeying the government guidelines, they too are wearing face masks and the victim, Mrs Potts, is soon confused as to who the actual criminals were. In minutes, Dan and Keith are prime suspects finding themselves fugitives from justice seeking to prove their innocence to the police, Mrs Potts, and their wives.