Two girls delete dying worlds for a living, and one day they find a third girl being born inside the one world they're supposed to erase. The entire movie is the cost of that choice, told in a structure that moves backward through time and sideways through genre, each layer revealing what the previous one meant. You watch it twice because the second time you understand what you were actually grieving.
Two girls patrol the Box of Wisdom, a gravity-less dimension where countless worlds exist simultaneously as points of colored light. Dual and Dorothy are custodians tasked with a grim responsibility: when viruses corrupt a world beyond salvation, they erase it completely. Their routine changes when they encounter Rimo, a mysterious girl under attack by the very threats they hunt. After pulling her to safety, they wait for answers about her identity and origins. When Rimo finally wakes, she speaks only in riddles and fragments, mentioning a flower patch she desperately needs to reach. As the girls piece together clues about this stranger and why she carries such profound importance, they begin questioning whether their duty to eliminate infected worlds aligns with what might actually save them. The deeper they investigate, the more they realize nothing about Rimo is coincidental, and her presence could rewrite everything they believe about their purpose and the nature of the worlds they protect.