The Alert brothers is a school safety guards who's very responsible for the safety of students. They directs traffic infront of the school and steps in to handle dangerous situations on school! But recently, some competent security guard (Mister barrel) have been doing most of their work for them and they're jealous of that. Redhalt's better in sensing danger, greenmile's quicker to assess situations and resolve them, and their brain (a small yellow-eyed head) process the signals simultaneously!