A war was happening between the Delinquents, aka the people from the ark, and The Grouders aka natives who have survived the earth and have been there way before the Ark sent the 100 down.

Raven, the area's mechanic of the ground is temporarily paralysed due to violent John Murphy shooting her while he tried to get revenge on Bellamy Blake for letting the group hang him over a false accusation.

Though John is long gone now as he's managed to escape. And now Finn has left to get an antidote from a friendly grounder named Lincoln, who also happened to be dating Octavia Blake, Bellamy's younger sister.

Hours later Grounders come and start attacking as the clock is ticking ominously.

Raven earlier had the idea to use the rocket, known as the dropship's fuel to go up into the sky for moments at a time to burn all the grounders, which does happen.

Though Finn, Bellamy and a random two people are outside of the drop ship and didn't make it in when the hatchet closed and rose up to the sky for seconds and burnt all the grounders who were fighting.

All the other survivors step out of the little rocket when the whole thing stops, they step outside and look around, until they pass out from red mist, with no Finn or Bellamy in sight, at all.

Once the crew wakes up there's no sign of Raven, Finn or Bellamy at all.

Turns out they were taken by the mountain people, aka people who have been surviving for years but cannot go outside due to their bodies not being able to stand radiation, unlike the 100 or Grounders.

But something feels off for Clarke...

Everyone else is settled in, having dinner as they've been here for a few days now. Jasper is talking to a nice girl from the mountain crew, her name is Maya.

Everyone is just fine, though something does certainly feel off to Clarke, but she can't pinpoint what.

Earlier, she was worried about one of the patients due to the random man's wound being a gunshot, and only the Mountain Crew and The Delinquents had guns, not the grounders.

But once invited to see it again by the Mountain's president, it looks like an arrow wound.

So now she sits and ponders about it.