When 29-year-old Lola (Gerwig) is dumped by her fiancé Luke (Joel Kinnaman) just three weeks before the wedding, she embarks on an emotional, year-long adventure of self-discovery filled with love, loss, hilarity and heartache. Guided (and often misguided) by the well-meaning advice of her close friends and eccentric parents, Lola's chaotic journey en route to the big 3-0 proves that a single tumultuous year can yield the lessons of a lifetime.