Just a few months shy of her 30th birthday, Gus Curtis finally feels like she has it all: a strong career, great friends, and a wonderful boyfriend. But all of this comes crashing down when Gus discovers Nate, her "Mr. Right," hooking up behind her back with her so-called "friend" Helen. Soon it seems like the life Gus has worked to make so adult looks a lot like the one she already had as a teenager, and Gus is left with more questions than answers: Can she win Nate back before she turns 30 alone? (And if so, does she really want him?) Is Helen really as devious and manipulative as she seems, or, worse, is Gus more like her frenemy than she ever imagined? And is she ever going to grow up? With the clock ticking down to her birthday, Gus discovers that sometimes the best thing about best-laid plans is trashing them altogether.