Jin proudly dons his new doctor's coat around town, unwittingly drawing the attention of a creature named Morty; after a slobbery lick from Morty, Jin turns invisible.
Popular vlogger Bryan Wu sets out to capture viral-worthy footage of creatures and magic under the guise of helping Yi and her friends get out their "creature awareness" message.
While her mom and Nai Nai prepare for the grand opening of their family's dumpling shop, Yi, along with Jin and Peng, discover that Yi's violin has attracted a magical, bird-like creature, Fenghuang, who needs their help.
Yi discovers one of Morty's babies still in her building and attempts to juggle her various responsibilities, but it becomes too much and she accidentally "loses" Mini-Morty; Yi enlists help from Jin and Peng.
Yi and the crew notice that Everest isn't looking too great; the crew tries everything to cool him down, even begging their old foe, Burnish, for help.
An earth-shaking rumble signals the arrival of a new creature, but Yi and Jin butt heads when each is convinced that they're the better team leader; the crew eventually discovers that a massive Sewer Koi is behind the earthquakes.