After Rek'taka was defeated, Boboiboy and his friends stumbled upon an underground ancient kingdom, hidden for centuries. As they explored, a powerful entity awaken from its long slumber

Gopal: "w-what is that?!"

Fang: "who are you and what are you?"

Yaya: "I think it's an ancient entity from old kingdom"

Ying: "yeah, but the question is which old kingdom? there's no history about this hidden kingdom"

Boboiboy: "I'm not sure either but we must be careful, we don't know what they want"