查理(弗瑞曼饰)经常会猝倒,这是一种嗜睡症的症状。每当他经历强烈的情绪,尤其是喜悦时,就会突然麻痹。他学习了各种各样的技巧来避免让自己过于快乐和幸福,但当他坠入爱河时,这些技巧都面临着终极考验。Charlie suffers from cataplexy, a symptom of narcolepsy that causes sudden bouts of paralysis whenever he experiences strong emotions -- in particular, joy. He develops a variety of techniques to deny himself too much pleasure and happiness, but they're put to the ultimate test when he falls in love.