The dog, Lilly, got sick. Pallas (the girl in the blue dress) didn't know why people got sick, so she asked Akilina (the girl in the red dress) for an explanation. (Kosta sees a bear so he gets to work fighting it off) Since they're Ancient Greeks they explain logic and science with myths.
(Akilina narrating) Pandora had been brought to life by the gods, and Zeus had given her a box. That box was full of sickness and death and bad things that people didn't need. Why Zeus gave the box to her, I don't know.
Hades: Hey. What's up? Pandora: ... Hades: ... Can I eat
Aphrodite: If anyone asks, I didn't make her. Zeus: ... Athena: Ugh!!! She's so dumb!
Pandora opened the box, releasing all the sickness and evil things that were contained inside. From Mt. Olympus Zeus, Aphrodite a tree nymph and Athena, the goddess of wisdom, sat on the steps of the palace and looked down upon Pandora with rage at her actions.
Pandora got pushed into Charybdis and died.
That was for opening the box that Zeus gave her [in the first place].