The Keepers about the unsolved murder of Sister Cathy Cesnik, a beloved nun and Catholic high school teacher in Baltimore. After disappearing on Nov. 7, 1969, Cathy's body was found nearly two months later but to this day, the case remains unresolved. Only days later Joyce Malecki disappeared from a shopping mall on Nov. 11 1969 in Glen Burnie, a suburb of Baltimore. Her body was found the next day face down in remote woods. This case also remains unresolved.