At the tender age of 10, Alice Amakawa was deserted by her mother and the family servant. Now, at 16 years old, Alice lives in isolation with only her loyal talking pet, Papi. Her sole responsibility is to safeguard her dwelling and the rest of Nemiki City from the notorious Cosmofs - cute-looking creatures that can unleash havoc on their surroundings. Alice yearns for the return of her family after having endured six years of seclusion.
On her birthday, Alice's mundane routine takes an unexpected turn when she becomes a subject of pursuit by the Space Police. Her mother's connection to the Cosmofs, combined with Alice's expertise in exterminating them, makes her a valuable asset. As she flees from the authorities, the Cosmofs make an uncomplicated demand that signals the beginning of a time-defying adventure. Alice finds herself catapulted back several years into the past, where she encounters a younger Raika Amakawa and her loyal servant Imori. Alice is overjoyed to be reunited with her long-lost family, but destiny has other plans for her, and her joy may not last...