Miles Morales, A.K.A. SPIDER-MAN, faces his greatest challenge yet - BABY SITTING HIS LITTLE SISTER BILLIE! But wasn't he supposed to fight crime with Shift? Oh, and there was a thing with Ms. Marvel! Oh no! He forgot to call Ganke back! And he's an hour late to meet Starling?! Miles' world is spinning, and he has no idea that it's all about to get turned upside down!