Calcutta Kiss (Detective Byomkesh Bakshy, 2015)

Based on the prompt:

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Calcutta Kiss

"Are you Bhuvan Banarjee?" 

"Who is asking?" he slurred. He was in some goddamn shanty bar of Calcutta, with no idea what he was going to do next, after having been fired.

"They say you used to add opium to the medicines at your last job. Is that true?" Although he was drunk, Bhuvan knew that the man sounded confident, even if he was asking a question.

"What do you want?" 

"I have a job opportunity for you. You can earn much more than you can imagine." Bhuvan looked up at the man. He was tall, and something about him made Bhuvan shudder, but whether it was from his stupor, or fear, he didn't know.

Bhuvan looked proudly at the crystals he had created. They had come clean in the lab test. Pure heroin, but he couldn't risk testing it on himself.

"Would you like some paan, Bhuvan Babu?" his new roommate Ashvin asked. Bhuvan smiled a feral smile.

"Why not. But tomorrow I will make the paan, and you will love it! You'll probably get addicted to it!" He gleamed.

A few months later, surrounded by dead bodies and blood, Byomkesh Bakshi wondered if the man was a simple genius or just a greedy man. The man whose disappearance had landed him amidst a Chinese gang, a drug lord, and an almost Japanese invasion. 

"Don't worry about it. He is dead now," Ajit said, and Byomkesh could see that he was disappointed in his father.

"Chai?" Byomkesh nodded, and Ajit left.