We're invited to a party at my friend's house (she's not one of us, but not one of them, either.) It was so cool--until Marco went mouse and blackmailed Aximili-Esgarroth-Isthil (Ax-man) to come with him, disturbing the only semi-normal peace we have in our lives. When he tries to demorph, things go wacko, and this...this thing is after us. Like a dust storm. A beast. And on top of that, before Rachel had a chance to go to her gymnastics thing, she morphed eagle (for some fresh air) and got mobbed by jays. Now she doesn't have her memory, Cassie's gone roach, Visser Three's "dog" is on the loose, and Tobias's sleeping! Six morphs might have made us sick, but we're the Animorphs, and we won't let any Veleek, even if it is from Saturn, detect us morphing, wrap us up, and carry us up to the Visser! So read our tale of heroics (or being slightly worried, like crying like a baby), and help us get rid of this big windbag's dusty butt!