Natwar is a drama about a lower middle class man.who , after his innocent son arrested for being the accused of riots, wants to get his son free. This becomes increasingly difficult because of corrupt system.

You describe a serious scenario. No need to tell us it’s a drama, and don’t mention the title. OK, now I’ll get to what you’re trying to say here:

‘After his son is arrested and charged with causing riots, a lower-middle-class man tries to prove his son’s innocence while battling corrupt officials.’

Instead of telling us his class, how about using a word or words that describe a flaw that might hinder his attempts to help his son