when dipper and Mable's parents let them come back to gravity falls after four years there both very excited but to be able to come their grunkels had to promise to keep them safe. what happens when the creature of gravity falls wants their king back? who will they go to? and will this person also want HIM back? and does he actually know how much he misses him as well? And will dipper be that person?!?!?!?!