Peace reigns in the Underground.

Monsters laugh in Grillby’s. Papyrus shovels snow. Frisk has already saved everyone — a True Pacifist ending, safe and sound.

And yet…

Tonight, a figure walks the forest trail alone. Tall. Pale. Cloaked in void. Each footstep crackles with static, as if time itself winces at his presence.

Sans looks up.

The screen flickers.

Frisk feels a cold chill — like someone watching from between lines of forgotten code.

W.D. Gaster is strolling through Snowdin.