The multi-part crime drama thriller "Top Boy" tells the story of two experienced drug dealers who find themselves back on the tough streets of the British capital. The main characters are obsessed with expanding their sphere of influence and making a fortune. Along the way, they encounter a young man who turns out to be a cunning and ruthless scam artist. The con artist becomes a real threat to the drug dealers, but getting rid of him is not so easy. The criminals are in for many dangerous adventures.