Twenty-four-year-old British painter Cleo has escaped from England to New York and is still finding her place in the sleepless city when, a few months before her student visa ends, she meets Frank. Twenty years older and a self-made success, Frank's life is full of all the excesses Cleo's lacks. He offers her the chance to be happy, the freedom to paint and the opportunity to apply for a Green Card. But their impulsive marriage irreversibly changes both their lives, and the lives of those close to them, in ways they never could've predicted.