Shaker Street residents are finding holes all over their yards. Are animals to blame? Are aliens? Michael, Liv, and Leo -- the Mysterious Makers of Shaker Street -- decide to investigate what's behind all the destroyed landscapes. After gathering some clues, the makers put their creativity and building know-how to work with a homemade metal detector. Will the makers' latest projects lead them to a space ship or a sinister neighbor? When the story's over, readers can become makers themselves by recreating the gadgets with the included instructions.