Kate Fox (Dakota Johnson) followed the rules all her life…until she got pregnant in college and dropped out just shy of graduation. After the birth of her daughter, Maddie (Maggie Elizabeth Jones), Kate put her 20s on hold. Now working as a bar manager to make ends meet and maximize her time with Maddie, she’s uber-prepared for every possible catastrophe – except for the arrival of her older brother, Ben Fox (Nat Faxon).
When Ben comes to crash on Kate’s couch for a few days, he finds a sad state of affairs. For the first time in their lives, Kate needs Ben’s help, and he’s determined to bring some much-needed chaos into her overly stable world. He starts by looking after Maddie so Kate can get back to making mistakes, since the one real “mistake” she’s made turned out to be the best thing that ever happened to her.