Marcie and Mickey Haines are 16-year-old athletic twins. They're inseparable, leaving their mother, Leonore, feeling excluded. On the day of an important race for Marcie, Michael is hit by a car and killed. The next morning she wakes to find the house full of mourners, talking about Michael in the past tense.

After an altercation between Alex, the president's son, and Britain's Prince Henry at a royal event becomes tabloid fodder, their long-running feud now threatens to drive a wedge in U.S./British relations. When the rivals are forced into a staged truce, their icy relationship begins to thaw and the friction between them sparks something deeper than they ever expected.

Two twenty-somethings, both reeling from bad break-ups, connect over the course of an eventful day in South London – helping each other deal with their nightmare exes, and potentially restoring their faith in romance.