Groot's home planet is no more! But who or what were the mysterious invaders that decimated it? And what life is still lurking in the once lush forest? Groot and Mar-Vell will need to stay on their toes, as they're being stalked by Yondar the hunter!

An all-new story starring everyone's favorite tree Groot, taking place during his childhood living on Planet X Cosmic mastermind Dan Abnett returns to tell a new tale from the sapling days of everyone's favorite monosyllabic Guardian of the Galaxy: Groot! Years ago in the tranquil glades of Planet X, Baby Groot is enjoying a happy childhood with his friends. But his life is about to be thrown into terrifying turmoil by a band of intergalactic despoilers who are asset-stripping entire worlds and leaving them barren! Can the young Groot escape capture by these marauders? What is the origin of this deadly threat? Why have the trees of Planet X fallen silent? And which young legendary hero-in-the-making will come to Groot's aid?