A few minutes after the last Bombero was finished with his bedtime story and tucked in for the night, PSC alerted the station for a house on fire on the 1000-blk of Merrimac Dr. The Engine responded with 6 and the Ladder went with 7. Initially arriving on scene with nothing evident, the Bomberos opened the front door and were greeted with moderate smoke conditions. After locating a working fire in the basement, the engine advanced the 400' with "surgical precision" and made a quick knock on the small fire while the Truck crews handled primary searches on the first and second floors. The remaining duties were quickly handled by the balance of the box alarm and we were back in our PJs before 0300.