For the first time ever, a film crew gains access to the vast and enigmatic Potter Street Station in Saginaw, Michigan. The film documents the investigators' exploration of the 30,000-square-foot building as they search for evidence of its infamous hauntings, particularly the legendary "woman in white." Nestled within Saginaw's industrial landscape, the station offers a glimpse into the past, surrounded by decaying saloons and abandoned buildings – a hidden secret of the city. Locked inside overnight, the investigators have until dawn to find proof.