A new case for the Coscorrón sisters! This time they have to travel to New York, where the International Granny Detective Conference is held, the most important conference of investigative grandmothers in the world. The Plaza Hotel is full of celebrities: the Tiatrappo sisters from Italy, the Akí Mekedo from Japan, even Donald Trompazo himself. But amid all the tumult, there is a mystery: the hotel’s toilet paper disappears without explanation. Las Coscorrón, Marcelo and his new friend Max are on the trail of a culprit. Who will it be?