The heroic actions of Asriel Dreemurr and his new brother Frisk Chrono have freed the Monsters from their underground prison. Finally released from the clutches, the Monster race decides to leave in waves. Frisk, Toriel, Asgore, Sans, Papyrus, Undyne and Alphys leave ahead of everyone to scout their surroundings. They come across a strange waterfall with even stranger properties…

Meanwhile, Mettaton and Nabstablook, with surprising help from Muffet, try to keep the other Monsters entertained while they wait.

Asriel is surprised when he does not turn back into a flower. He slowly tries to piece together why his body stayed in fact; how his soul came back together after so long. He soon finds out just how much both his late adopted sister Chara Martin and current brother Frisk love him.

Takes place after the Season 6 Finale. Contains lethal amounts of bad puns. SPOILERS!! (duh)