Perfect Number (Hangul: 용의자X; RR: Yonguija X; lit. Suspect X) is a 2012 South Korean mystery-drama film directed by Bang Eun-jin. Adapted from Keigo Higashino's novel The Devotion of Suspect X, it centers around a mild-mannered mathematics professor (Ryoo Seung-bum) who plans the perfect alibi for the woman he secretly loves (Lee Yo-won) when she unexpectedly murders her abusive ex-husband. Cho Jin-woong received a Best Supporting Actor nomination at the 49th Baeksang Arts Awards in 2013.Synopsis
Harcelée par un ex-mari violent, Hwa-Sun le tue accidentellement en tentant de défendre sa fille. Suk-Go, son voisin, taciturne, reclus, mais brillant mathématicien, a tout entendu de la dispute et son dénouement fatal. Secrètement amoureux d'elle, il n'hésite pas un seul instant et court lui proposer son aide pour confondre la police.
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