One of Chicago’s best-kept secrets takes center stage in Chuck Coppola and Harvey Moshman’s documentary. The year is 1915, and thousands of Western Electric factory workers, most of whom are eastern-European immigrants, board the SS Eastland on the Chicago River to sail to neighboring Michigan City, Indiana, for a rare vacation day with their families. Unfortunately no one on the ship makes it to their destination that day—and for many years restricted access to footage from the wreck left Chicagoans without a clue why. The documentary’s producers delve into details behind the disaster through the lens of survivors, their families, first responders, and newly discovered footage. The documentary seamlessly weaves the Eastland into the family trees of descendants of those involved in the wreck; it also gives a fresh perspective on how the capsized ship affected immigrant communities, who made up half of Chicago residents at the time. While at surface level the film can seem like a sensationalized recounting of a catastrophe, the heart of it shows how the debacle brought Chicagoans together in a united front against greed and immorality.