Write a story about a small town where a mysterious group of masked individuals appears every night, silently moving through the streets and leaving strange symbols painted on buildings

Write a story about a small town where a mysterious group of masked individuals appears every night, silently moving through the streets and leaving strange symbols painted on buildings. The townspeople are divided on whether the group is a cause for alarm or simply a harmless group of pranksters. One resident becomes obsessed with uncovering the truth behind the masked group, leading to a dangerous confrontation that will change the town forever.