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Nick (Michael Cera) cannot stop obsessing over his ex-girlfriend, Tris (Alexis Dziena), until Tris' friend Norah (Kat Dennings) suddenly shows interest in him at a club. Thus beings an odd night filled with ups and downs as the two keep running into Tris and her new boyfriend while searching for Norah's drunken friend, Caroline (Ari Graynor), with help from Nick's band mates.... Wikipedia