In Los Angeles, two couples navigate the complex and often humorous trials of modern relationships. Danny and Debbie meet through their outspoken best friends, Bernie and Joan, who are also in a turbulent relationship. Although initially cautious, Danny and Debbie quickly fall for each other, progressing from a one-night stand to a full-fledged relationship. They move in together, supporting each other through various challenges in their professional and personal lives, striving to build a stable and loving partnership.

Simultaneously, Bernie and Joan's relationship is far less stable, filled with passionate arguments and spontaneous reconciliations. While Bernie helps Danny navigate his new relationship, Joan offers Debbie advice that often complicates matters. As the couples experience highs and lows, they confront issues of trust, commitment, and personal growth. The movie intertwines their journeys, highlighting the balance between love and friendship in the context of contemporary dating life.