Dirty Pretty Things (2002) on Netflix

Okwe is an illegal Nigerian immigrant leading a hard life and struggling to survive in London's underground. He works as a hotel receptionist in the night time and as he has a doctor degree he practices some medicine, during the day, in a very odd way . Besides that he must constantly escape from Immigration officers. One day Okwe discovers by chance an illegal scheme of surgeries is being lead by Juan, his boss in the hotel. Juan quickly comes up with a tempting proposal: if Okwe accepts to perform the illegal surgeries he makes a lot of money and gets legalized situation in the U.K. Can Okwe keep his moral values intact?