Olivia and Brian have been at odds over a real estate development project that they are working on. They have different ideas on how to go about it and their constant bickering at work has caused tension between them. They are both surprised when they find out that they are both in the wedding party for their mutual friends' wedding.
Olivia is the Maid of Honor and Brian is the Best Man. They reluctantly agree to put their differences aside and work together to make the wedding a success. As they spend more time together, they start to see each other in a different light. They realize that they have more in common than they thought and their constant arguing was just a reflection of their strong personalities.
Their mutual friends see the sparks flying between them and decide to play Cupid. They set them up on a date and it is a huge success. Olivia and Brian admit that they have feelings for each other but are hesitant to pursue a relationship because of their work situation.
As the wedding day approaches, they both realize that they don't want to lose each other and decide to take a chance on love. They confess their feelings and share a passionate kiss. The wedding goes smoothly and they are both happy that their friends had a perfect day.
In the end, they start dating and work together on the real estate project, using their newfound understanding of each other to create a successful outcome. They realize that they are perfect for each other, both personally and professionally. The movie ends with them sharing a romantic moment, watching the sunset together.