An elderly woman dies in a hospital in Stockholm and it turns out that she suffered from an incurable disease. Her son refuses to believe that it was the disease that was the primary cause of her death.

When Mats stumbles upon a pair of pants containing an unlimited amount of money, everything changes. Now he can buy everything he ever wanted, not knowing that powerful forces are tracking him down. The boy with the golden pants is an adventure film based on the Swedish classical bestseller by Max Lundgren.