Amaar's old friend and rival Ali comes to visit Mercy and the competition starts anew. Not only was Ali his rival back at the law firm in Toronto, but upon his arrival, Amaar learns that Ali has also become an Imam. Mercy isn't big enough for the two of them. Meanwhile, a water shortage prompts Rayyan to turn Mercy mosque into the world's first eco-friendly "green mosque." There is only one thing standing in her way—Baber.