Elysium is running out of air. They ought to be able to find the leak - if nothing else you'd think there'd be a draft - but it must be somewhere in the parts of the habitat where people don't normally go, where normally only Terry goes to fiddle with valves and wires, and Terry died in her sleep last night so isn't that a bummer. They really ought to have had a spare Terry, but this colony is just a few dozen weirdos who decided they wanted to live on Pluto and nobody else has the engineering knowhow. Someone's on a quest to find the key to the service compartments. They had to lock them after the six-year-old kept going in and unplugging things.
Somebody's gone into the emergency kit for an angel. The angel is very kindly making lots of trips through the airlock to haul rocks inside and turn them into air. He's not keeping pace with the air loss, though, and nobody's sure if he should try hauling bigger rocks (they'll take longer to extract, they'll take longer to haul) or if it would be more efficient to just turn the air directly into more air. Five people are having an oxygen-wasting argument about it.
Somebody went into the emergency kit for a fairy circle, too. The fairy said she could keep the air in if she knew where it was getting out, but she's not any better than the humans at figuring that out and she can't move things she can't see or even locate. She could take the entire colony back to Earth, but that would take hours, Pluto's too far away. Mars isn't close enough either. The readout doesn't think they have three hours.
There's more circles in the emergency kit, but the second fairy someone tried said she didn't work for free, and nobody had anything to give her that she wanted because they were all weirdos who wanted to live on Pluto. There's lots of circles. There isn't a lot of time.