High above the Manhattan streets, ex-cop and escaped convict Sam Worthington teeters on a 21st-storey window ledge and threatens to jump.

As a ghoulish crowd gathers below, New York police negotiator Elizabeth Banks tries to talk him down.

To reveal anything more would spoil this utterly preposterous but hugely entertaining thriller, which builds up a dizzying level of tension while gradually revealing what Worthington is up to and what it’s got to do with Ed Harris, Jamie Bell, Genesis Rodriguez and a very large, very valuable diamond.