The Alamo is a former Roman Catholic mission and fortress in San Antonio famous for the 1836 military conflict known as The Battle of The Alamo between Texan and Mexican forces.
In the present, an unidentified horseman manifested in and around the Alamo but was in a confused state. It rode through walls and civilians and coated everything and everyone in Ectoplasm. While no injuries were caused, there was some minor property damage to display cases that were overturned and stained. The Texas Board of Tourism requested a public investigation by the FBI to increase confidence on the part of the visiting crowds, who filed complaints.
Special Agent Melanie Ortiz was asked to look into the matter with as little discretion as possible, so as to entertain the tourists. The New York branch of the Ghostbusters were unable to commit any resources to the investigation so Melanie contracted Dani Shpak and Lou Kamaka from the Chicago Ghostbusters. The ghost fled from them at each encounter but eventually muttered in Spanish. Melanie realized the ghost didn't where it was and was scared. They managed to engage it in verbal communication and explained what was going on. The ghost regained its composure, apologized, and peacefully dispersed. Follow-up scans were conducted and confirmed P.K.E. Levels were back to normal at the Alamo.