1. Geeky accountant meets smooth-talking lawyer 2. Geek spots attractive blonde on train 3. Audience suffers stereotype overload 4. Second-hand designer suit and cell phone switcheroo leads to geek getting a life 5. ... and maybe losing his
Great performances by Ewan McGregor (geeky accountant), Hugh Jackman (smooth-talking lawyer), Charlotte Rampling (smoldering seductress) and Michelle Williams (attractive blonde) are almost eclipsed by an unrealistic screenplay involving the intertwining of two different storylines into a forgettable psychological drama, that starts well, but then is frittered away to absolutely nothing much.
You already know pretty much what's going on just by reading the title, so I'll just add that it involves mutually agreeable short term relationships, financial finagling and ruthless rub-outs. There are many twists, and a couple of them (or at least one in particular) are quite good.
Rent it for the acting, but it probably won't initiate a purchase decision.