The Burnt Warehouse

One day, you find that Gale is rushing toward the Portia Harbor.

You hurry to the harbor to find that the warehouse has been burned down, and the arsonist left a note. Albert and Arlo are there speculating.

Accept the mission and go talk with Petra about making a new cooling unit.

She says she needs time to discuss with Merlin and figure out if they're able to make a cooling unit. She'll inform you once they have some results. She will send you a letter soon after:

She suggested you go to WOW Industries since she and Merlin were not successful. Go there and search until you find one, then report to Albert.

After the culprit behind the burning of the warehouse has been identified, City Hall will send the following letter: