Oh no! After Bill Cipher's defeat dhring the events of Gravity Falls, in order to survive, he used the very last of his power to fling himself across the multiverse, hoping he would land somewhere with a new vessel for him to occupy while his true form is rapidly disintegrating...

And how lucky! He did find a vessel, Luca my epic so cool OC!!1!!!1! Unfortunately, spending so long in Luca's body without the ability to leave has caused Bill to start acting strangley... can you help him out with his- er.. HER new problems? The KIND OF PROBLEMS???