Alison Scott, an ambitious entertainment journalist, is on the verge of a major career breakthrough. After receiving a promotion, she goes out to celebrate with her older sister Debbie. The night leads her to a local club where she meets Ben Stone, an easygoing slacker with an immature outlook on life. Despite their differences, a drunken encounter results in an unexpected one-night stand. The next morning, they part ways, thinking they'll never see each other again. However, their brief encounter takes a significant turn when Alison discovers she's pregnant. With her promising career ahead, she faces the daunting prospect of motherhood and the challenge it poses to her professional aspirations.

Faced with the reality of the situation, Alison decides to contact Ben and inform him of the pregnancy. Initially shocked, Ben tries to step up to his responsibilities, albeit awkwardly. The news forces them into an unlikely partnership as they attempt to navigate the complexities of an unplanned pregnancy. Despite their contrasting lifestyles and career paths, they embark on a journey full of humorous and challenging moments, as they try to understand each other and prepare for the arrival of their child. Their attempt to build a connection and make the situation work highlights the unexpected ways life can bring people together, testing their readiness for such a monumental change.