It can get lonely being a squirrel and a girl all in one. Squirrel Girls friends are fine and all, but the young Super Hero longs for more: namely, people who truly understand the two hats she wears in this world. Who better to connect with than the Avengers, the tightest Super Hero gang around? When Squirrel Girl decides to sneak into the Avengers Tower for a self arranged meet and greet, and yes, possibly a quick selfie with the one and only Tony Stark, she never expects to be pulled onto a last minute mission with Captain America, Thor, Hulk, Iron Man, Black Widow and Hawkeye! But is Squirrel Girl ready for the big time?!