An intruder attacks Sanctuary 573, forcing Eva above ground. Alone, she relies on her survival skills and a cryptic note labeled "WondLa."

Eva discovers she’s on a planet called Orbona, where she meets a telepathic water bear named Otto and a surly alien named Rovender.

Determined to find other humans, Eva enlists Rovender's help—but getting her first real lead comes at a high price.

Despite Muthr's protests, Eva follows through on a daring plan and forms a friendship with an unlikely ally.