Clover fell down because they're looking for the other 5 who fell

unaware that they're dead, Clover goes into the underground with the goal to find the other 5

Flowey messed with the levers to make Clover fall into the ground

Dalv flees because he hasn't slept well so he thinks he's hallucinating

You can befriend, kill, or even betray him

then you enter snowdin, which you meet Martlet there, she tries capturing you for protocol but decides to help you out, the boat, known as "Ava" by Martlet, it speeds up too fast and Clover falls into the dunes, eventually they get to the wild east, where Starlo replaces Clover's gun with a wild revolver and the hat with the nice hat, then after some stuff, Clover becomes the deputy, so the group splits up because they had harder challenges than Clover so they don't find it fair, Clover fights Starlo and everything gets fixed, if you're on Pacifist, the timeline I'm explaining, then Ceroba follows you into The Steamworks, the robots don't give EXP, but Axis does because he killed integrity, Chujin built Axis, his model when fighting Clover is Model 14, after the Axis fight, Ceroba's house gets searched by the others, Ed found the trapdoor so They start keeping Clover safe, by keeping them in town, alot more (I don't feel like explaining EVERYTHING) and you fight Ceroba, she's trying to save her daughter Kanako with a pure soul, Clover's soul, You can Spare her for True Pacifist or Kill her for Flawed Pacifist.