At about 1835 mountain time, a Piper PA-34-220T crashed as the pilot attempted to abort the landing at Show Low Municipal Airport. The flight instructor, pilot under instruction, and pilot-rated passenger were not injured. The instructor said they conducted a simulated single-engine approach to runway 3 but the left engine was unresponsive when the pilot taking instruction applied power to make a go-around. The instructor retracted flaps and gear but the airplane continued to descend into the ground. The density altitude at the time was 9,088 feet. The runway was not the active runway at the time and was not equipped with runway lighting.