The “based on a true story” trope is equal parts appealing and daunting for a filmmaker. An amazing story rooted in some sort of reality can feel like the perfect creative storm. But how do you do it justice — especially when it hits close to home for a community in the wake of a tragedy? That was the challenge facing Evan Ari Kelman, director and co-writer of Where There’s Smoke, when he set about exploring the transformative nature of the tragedy that occurred one night in 2005 when three FDNY firefighters lost their lives — otherwise known as “Black Sunday.”