Peter Berg , and the second in 2016 alone ( the first being Deepwater Horizon ) , is about the terrorist bombing at the Boston Marathon on April 15, 2013, which killed three people and wounded hundreds, and details the unprecedented citywide manhunt that took place over the following week, a week when all of Boston was shut down. Patriots Day is at its best when it focuses on the real-life people—first responders, overwhelmed emergency room doctors, local policemen and FBI agents, those manning the phones for citizen tips, the hacker-types analyzing mounds of video footage—who ran to the middle of the maelstrom and got busy helping, the living embodiment of Boston Strong.