He finds online scam artists in India engaging in phony tech support extortion schemes and destroys them, albeit temporarily. He is an obvious computer whiz.
While the bad guys think they have another rube on the line, he is breaking into their own systems and deleting their files.
After he tells them what is up and confronts them with their sins they freak out and he engages in some wonderful swearing in hindi. Very addictive, don't say I didn't warn you. Guy is doing a great service. Hard to say where to start, you might try this one. Or this. But they are all great. Don't say I didn't warn you. Benchod.