Cal (Steve Carell) is stunned on date night when his wife (Julianne Moore) asks for a divorce. Moping in a bar, Cal meets Jacob (Ryan Gosling), a smooth-talking swinger who agrees to make Cal over into great date material. And that's just the startl Dan Fogelman's rom-com is dead-set on covering half-a-dozen interconnected love stories. I appreciate the idea, but the multiple plots of varying degrees of seriousness end up diluting the core theme about finding and keeping soul mates. And the surfeit of romances is not helped by the film's wildly shifting tones -- from Lifetime movie moments to slamming-door farce to kinda creepy. (Some actions played for laughs or emotional payoffs are what we'd call "stalking" or "wildly inappropriate" in real life.) Somewhere in this roundelay are winning moments, mostly from this summer's It Girl, Emma Stone, brings a no-nonsense freshness to Hannah, and Ryan Gosling, who shows he can do funny.