The Hoarder (2015) online

When Ella discovers her Wall Street banker boyfriend is renting a secret storage unit, she suspects he's using it to hide an affair. Enlisting the help of her best friend Molly she breaks into the facility only to discover something more terrifying instead. Now trapped in a darkened building with a group of neurotic strangers who start disappearing one by one, Ella soon uncovers even worse horror in the dank depths. Her life or death battle to escape eternal enslavement is about to begin....