哲学教师墨林 (Merlí) 在课堂内外不拘一格，常常令墨守陈规的学院主任托尼 (Toni) 大为光火，却又让纠结于家庭、身份、关系与情感的学生们对哲学如痴如醉。

Buffalmacco and his friend Bruno Degli Olivieri make a joke of Calandrino, forcing him, for ten florins, to buy a stone that should make invisible the one who owns it.