The woman’s sister, after her death, is cloned. The woman resents her clone, as it is a mockery of her, the sister whom she used to sing and stick together with through everything. Now, the clone has been trained for several weeks, while the woman feels isolated in her crew. She bemoans how smelly her survival suit is. She thinks about how when people, like her sister, die in cryo, their bodies are reduced to fertilizer, and all she was given was an urn of her sister’s. Now, she has her clone.

The crew gets ready as their ship approaches the Sunnet planet. Their mission is to find a place to produce food for their colony. They first do a training, and their instructions are to go to assigned sites with rovers, operate scanners and samplers, and report back. For more sketchy terrain, they must bring their scanners and samplers by hand, leaving their rovers in a more appropriate place for the time being. The woman thinks about how she and her crew are nothing more than bodies meant to drag machines around. She reflects on how, hundreds of years ago, the UN left Earth and grew livable environments on other planets, though they were soon claimed by the First. Now, Sunnet is the last world suitable, barren after failed attempts at settlement.

The crew tells the woman to go out on a rover with her sister’s clone. She protests, but she must oblige with captain’s orders. She wishes her real sister could be with her, after having survived cryo. On the rover, she pilots through the darkness, across Sunnet, while never speaking to her clone. They fly through dust, ash, and falling rocks for hours. At night, they landed on Sunnet and set up tents and inflatables outside of the rover to sleep.

In the morning, the woman finds out that a sampler fell down a crevice and that the clone went off to get it, though now, the clone needs her help. She navigates the rover to the crevice, where she berates the clone and lowers a tow line to it. Against the clone’s wishes, she ends up bringing down two lines, one for the clone, one for the sampler, so that the sampler isn’t lost. The clone, however, says that the crevice leads further down into a cave. For now, the woman says to resurface and save exploring for tomorrow.

The day after, the woman and the clone hardly speak. The woman sends a report, stating her plans to explore the cave from yesterday, though she won’t bring the sampler, in fear of losing it. She wishes to go alone, but she is required to be accompanied by her clone. Later, they descend into it, beside one another. Suddenly, when they’re low enough, they both have the idea to unhook and jump into the cave. They briefly laugh, but soon enough, the land their lines are hooked onto gives away, and they decide to jump in.

The woman wakes up. Her helmet is cracked, and her emergency oxygen is gone. The clone is gone, too. She crawls around and collapses, though eventually, her hand reaches the clone. The clone tells her that there’s oxygen here, though the woman didn’t know, as her helmet and its display are no longer functioning. Together, they go further into the cave, where mushrooms start to appear along the rock. There, they see a cavern full of green, which overwhelms the woman with emotion. They sing and sing, all through the day and night. The clone, finally, acknowledges that she isn’t the woman’s sister. She accepts this truth.