Ryan North brings the sensational saga of Squirrel Girl to a close! Brain Drain is missing! A sinister face from the past returns! And the hitherto unbeatable Doreen Green will have to face certain defeat in order to save her friend! Because it´s Ryan´s last story ever, he and artist Derek Charm are going all out to make it completely huge and amazing -and it is going to blow your mind! The most nuts Squirrel Girl tale ever sees lives hang in the balance, narrative threads resolved -and shocking reveals, um, revealed!