It's 2019. Five ladies of the Bradley family are having milestone birthdays. Katie, 9, is doing her best to navigate a family of nothing but adults. Haley, 19, is doing her best to not fall again for the girl who broke her heart. Meanwhile, Maddie, 29, is trying to figure out her place in the world, and Jess, 39, is battling both addiction and a dramatic loss. Then there's Greta, 49, who is poised to finally make a big change in her life. Lives are changed and family dynamics are challenged, as the Bradley family discovers that growing up doesn't have an expiration date.

One night in March 2019 nine-year-old Katie Bradley is told that her uncle Thomas has died and that her aunt Jess isn't doing too well. What follows over the next several months, culminating on New Year's, is an exploration of family dynamics, as the reader follows the lives of five female members of the Bradley family.