Can be read as a stand-alone
Wies and the twins Zane and Jazz love being in Grijsoord House, the cozy home of grandma Wisse and her friends. One day men with tape measures come by. They are from the Welfare and Residential Safety Foundation. Their boss says the home needs to be remodeled. Otherwise, the residents will face a sky-high fine. But the renovation is a disaster. Suddenly it is much more dangerous to live in Grijsoord House! Together with the twins, Wies comes up with a plan to help grandma Wisse and her friends.