Cassie Moore, 28, has always played it safe, living life according to a meticulously organized Master Plan. But when she loses her Perfect Job and finds her fiance in bed with his ex on the same day, it's clear that The Plan has failed her. She awakens the next day from a drunken stupor to discover that she's booked herself on a six-month trip to Buenos Aires. She speaks not a word of Spanish, but she's already emailed the news to everyone she knows, so there's no turning back. Once in Buenos Aires, Cassie is reluctantly seduced by this glorious city.
Her exuberant landlady introduces her to the handsome but haughty Mateo, a man Cassie clashes with right from the start. She soon befriends other lovelorn travelers and together, they start a 'Brokenhearts Club' at a local bar, attracting a cast of characters that includes Dan, a sweet handsome man who lives as carefully and predictably as Cassie.
Before long, Cassie's making a new plan: 1. Learn Spanish. 2. Stop obsessing about impossible Mateo and fall for perfect-on-paper Dan. But staying on track isn't so simple anymore and Cassie finally realizes that sometimes life—and love—defies her best-laid plans.