正直探員杜馬（阿爾柏仙奴）與拍檔到沒有黑夜的阿拉斯加協助調查一宗命案。誰料杜馬在追兇時誤殺拍檔，杜馬在內疚和無法入睡下瀕臨精神崩潰之際，真兇作家華特（羅賓威廉斯）與他大玩心理戰，加上女幹探艾莉（希拉莉絲韻）的進逼下，把杜馬推向不歸路。

INSOMNIA Invited to Nightmute, Alaska, to head a murder case, an LAPD detective finds his investigation disrupted by an ever-shining sun that deprives him of sleep, and by guilt over a second crime that may be a figgment of his increasingly unstable consciousness. Christopher Nolan directs this psychological thriller from a screenplay by Hillary Seitz.