The Z-Stacks and Star Tugs competed for a contract for transporting steel for the company. The company was preparing to move across the bay. To win the contract, one fleet had to deliver more steel in one day than the other. Big Mac and Warrior were chosen to compete against Zak and Zebedee who were confident that they would succeed. But when the tall bridge section being taken by the Z-Stacks collided with a low railway bridge destroying both, the Steel Company got the contract for repairing the bridge, and Captain Star had no trouble in convincing the Steel Company that the Star Fleet was a better option.