Set in New York City nightclubs and junkie hangouts, The Darkest Tunnel spends a week in the lives of two young, gay men. Sonny is a South Asian man from New Jersey and aspiring nightclub party promoter with an outlandish fashion sense. Pedro is a drug-addicted art-school dropout who has rejected his parents' upwardly mobile ambitions. The young men's chance encounter in a subway tunnel during a fatal stabbing sends Pedro on a guilt-ridden drug binge fueled by prostitution. Pedro's quest for drugs and money sends him through seedy scenes on Manhattan train tracks and piers. Meanwhile, Sonny refuses to report Pedro's crime and instead traipses through outrageous nightclubs promoting his big debut as a party promoter. Distracted by his thirst for minor celebrity, Sonny doesn't realize that Pedro begins stalking him.