To access this quest, you need to have the Oasis built.
Click on the Trader's Tent to activate the quest.
The main quest has 10 stages.
PLEASE NOTE! Each of the 10 stages has a timer. If you fail to complete any of the stages in the allotted time, you will need to start it from the beginning or instantly complete it for superbucks.
You can start each stage over again as many times as you like and absolutely free.
Stage 1 (24 hours)
Collect 40 feather dusters (Shoe Shop, Upgraded Shoe Shop)
Collect 10 fire extinguishers (Water Tower, Upgraded Water Tower)
Collect 15 shovels (in friends' cities)
Stage 2 (24 hours)
Collect 40 towels (Recreational Cottage, Upgraded Recreational Cottage)
Collect 20 petrol cans (Petrol Station, Upgraded Petrol Station)
Collect 10 thermoses (Shopping Center)
Stage 3 (24 hours)
Collect 10 orchids (Upgraded Flower Kiosk)
Collect 5 memory drinks (Drugstore, Upgraded Drugstore)
Collect 25 daisies (in friends' cities)
Stage 4 (24 hours)
Collect 38 barrows of soil (Farm, Upgraded Farm, Megafarm when harvesting squashes)
Train 5 builders (College)
Ask friends for 12 sunglasses
Stage 5 (24 hours)
Produce 14 lots of silk (Textile Factory, Upgraded Textile Factory)
Collect 10 decorative fans (Ice Cream Parlour)
Collect 12 antique vases (Jewelry Shop)
Stage 6 (24 hours)
Collect 20 wooden beams (Cargo Port)
Collect 3 strong ropes (Kindergarten)
Collect 10 tire jacks (Auto Repair Shop)
Stage 7 (24 hours)
Collect 30 binoculars (Hostel, Upgraded Hostel)
Collect 15 ink (School, Valley School)
Ask friends for 14 paintbrushes
Stage 8 (36 hours)
Collect 26 paint rollers (Petrol Station, Upgraded Petrol Station)
Collect 2 respirators (Hospital)
Collect 10 face paints (Cosmetics Boutique)
Stage 9 (24 hours)
Collect 4 office chairs (Sky Tree)
Collect 4 dressing tables (Furniture Factory)
Collect 9 oars (Shopping Center)
Stage 10 (24 hours)
Collect 16 cushions (Wooden House)
Collect 10 dragon fruits (Fruit Market)
Collect 12 toy koalas (Summer Mansion)
After completing the quest, you will receive a new item - Work Tool.
In the future, it can be produced in the City Centre at the Cargo Port. 
You also get access to the Trader's Tent and can complete orders to obtain items needed to complete various game quests and produce various items.