Fire engines race to a smoky house fire while Upton is on a walk with his ?human? father. They are naturally drawn to the scene where the find that the home's thermostat hadbeen turned all the way up, despite the heat of asummer day.Inside the house the priceless collection ofart is cover with soot from the smoke. Something is wrong and Upton, joined by his assistant Watson and the rest of the Charles family, intend to find the answer.