Jerry Peyser (ALBERT BROOKS) is a conservative podiatrist who, along with his wife Katherine (MARIA RICOSSA), is looking forward to the marriage of their daughter, Melissa (LINDSAY SLOANE), to her boyfriend Mark (RYAN REYNOLDS).
Little does he know that his future in-law, Steve Tobias (MICHAEL DOUGLAS), isn't a copier salesman. Instead, he's a deep-cover CIA agent who, along with partner Angela Harris (ROBIN TUNNEY), is trying to take down Jean-Pierre Thibodoux (DAVID SUCHET), an international smuggler who's interested in a Russian sub named Olga.
On the night of their first meeting, Jerry learns of Steve's real profession and immediately wants to call off the wedding. It's not long, however, before he's targeted by FBI Agent Will Hutchins (RUSSELL ANDREWS) and his team who claim that Tobias is a rogue agent with own agenda. After Steven and Angela rescue Jerry, he soon finds himself traveling overseas where he meets the flamboyant but volatile Thibodoux who takes an instant and unwelcome liking to him.
From that point on, Jerry tries to stay out of harm's way and prepare for the upcoming nuptials as well as the arrival of Steve's bitter ex-wife, Judy (CANDICE BERGEN), all of which promise to make this a wedding no one will forget.