GiGi(Ginnifer Goodwin 饰)是个对爱情充满幻想的女孩儿，却在一次次约会中受挫。她的闺蜜Beth（Jennifer Aniston 饰）和Janine（Jennifer Connelly 饰）不断鼓励GiGi在感情中振奋起来，却各自对爱情怀有遗憾。Beth与Neil（Ben Affleck 饰）同居七年，却一直未能等来期待的那枚婚戒。Janine的敏感让她与Ben（Bradley Cooper 饰）的婚姻陷入僵局，而Ben与歌手Anna（Scarlett Johansson 饰）的婚外情更是给他们的婚姻雪上加霜。Anna一边拒绝拥趸Conor（Kevin Connolly 饰）的示好，一边热情似火的期待Ben离开Janine，可是Ben真的能离开Janine来到她的身边么？另一方面Anna的好友Mary（Drew Barrymore 饰）在一个清晨和Conor面对面的不期而遇了。
几个女孩儿带着爱情的梦想在城市中跌跌撞撞，而此时一直未遇真爱的GiGi在酒吧老板Alex（Justin Long 饰）的口中听到了让所有女人心碎的话“He is just not that into you!”...
Ria Khan believes she must save her older sister Lena from her impending marriage. After enlisting her friends' help, she attempts to pull off the most ambitious of all wedding heists in the name of independence and sisterhood....
