Complex sentence: Upon their arrival at Chennai, Aras delivers Nalla's cheque to the union workers and invites Nalla to his wedding, where, to Nalla's utter shock, Aras's bride is none other than Bala.
Split into simpler sentences: Upon their arrival at Chennai, Aras delivers Nalla's cheque to the union workers. He invites Nalla to his wedding, where, to Nalla's utter astonishment, sees that Aras's bride is none other than Bala.