卡斯普是一位受人愛戴的高中歷史老師，由於基因缺陷，他的視力正在逐漸惡化，面臨著永久失明的可能。最初他傷心不已，為了保住自己的工作，也為了幫助他的學生們順利通過期末考試，他對校長隱瞞了他的健康狀況。 Carte Blanche is a story about respected high school teacher who hides his progressing blindness from everyone around him - his friends, family, students and superiors. The medical diagnosis leaves little hope. Due to a genetic disorder Kacper is faced with a very real possibility of permanent blindness. Initially heartbroken, he decides to hide his health problems to fulfill his educational duty and help students with end of school exams.