One night, the evil Yo-kai duo Kin and Gin steal the Yo-kai Watch from Lizzy Villot to help their master Dame Dedtime prevent humans and Yo-kai from being friends. She then encounters the Yo-kai Meganyan, who tells him that Yo-kai are real. She and the crew head to Andy's grandmother Lucy Loo Hopper, encounter a shadow and chase it, but to no avail. Meganyan returns, asking to pull out the cork in his body—the cork that suppresses his energy. Lizzy decides not to pull it out, and asks Jibanyan & Whisper to pull it out for him, but to no avail. Lizzy pulls it out, and he and the crew get covered in pink smoke. She e finds help from the Yo-kai Hovernyan - and uses a time stone to take Lizzy, Andy, Carmen, Whisper, and Jibanyan back in time 60 years to when the Yo-kai Watch was first invented by Andy Hopper's own grandfather Nathaniel Adams while he was a kid. Dame Dedtime gets word of this, and tries a plan to push the human world farther from the Yo-kai world. Together, the two boys battles against Dame Dedtime and her Wicked Yo-kai minions to save the world of the past from her evil plans and recover the Lizzy's Yo-kai Watch.