Fidelio
Don Pizarro, the military governor of the prison, hears that the prison is going to be looked at by inspectors who make sure that the prison is being properly managed.  He knows that he should not have locked Florestan up, so decides to kill him before the inspection starts.  He asks Rocco to dig the grave so that he can get rid of the body quickly.  Rocco does not want to do this, but has to agree.