Acting Like Adults

Brett has a plan. It's a good plan. He's signed himself and long time girlfriend Shannon up for a scavenger hunt around Los Angeles. If they cross the finish line first, they win a diamond engagement ring and Brett pops the question with romantic flare. Nothing could go wrong with this plan. Except for the fact that Shannon may not be ready for marriage. As Brett and Shannon face puzzling clues, 405 traffic, and curious exes, questions about their future together will arise. And by the end of the day, Brett and Shannon will learn the difference between growing older and growing up.