Kara "Tabb" Tabbin was an ordinary high schooler on Earth until she touched a mysterious, ancient relic that dissolved into her hand. Now, her life is a series of unpredictable jumps through the multiverse. Without warning or control, Tabb "shifts" between wildly different realities—from lush fantasy forests to harsh, desolate landscapes. Each shift brings new dangers, language barriers, and physical transformations, as Tabb discovers she has gained superhuman strength, speed, and healing. Accompanied by Malik, another victim of the shifting phenomenon, Tabb must learn the rules of survival in an ever-changing environment while desperately searching for the "catalyst" that might finally lead her back home.