Complex sentence: Trouble comes when Pooja's dad Vidyaprakash (Anupam Kher) mistakes Raja for Rocky (also Akshay Kumar) a lookalike of Raja who is a ruthless and merciless criminal who blackmails people for money or threatens to kill them.
Split into simpler sentences: Trouble comes when Pooja's dad Vidyaprakash (Anupam Kher) mistakes Raja for Rocky (also Akshay Kumar). Rocky is a lookalike of Raja who is a ruthless and merciless criminal who blackmails people for money or threatens to kill them.