Talk to Captain Dwayne Highway.

Dialogue

Dwayne Highway says "Have you been sent by Major Jacbobus?"

"Yes"

"Great, we have some urgent tasks that needs to be executed. We found out that the toxic fumes from this island does not originate from the volcano but from a creature living inside it, we call it "Hussk".

"What kind of creature is that?"

"We don't know, and we need your help in order to get him."

"Ok ..."

The required mission for this is "The volcanic island"