Thomas The Tank Engine soon finds out that there is a mysterious man lurking around The Island Of Sodor, and has teamed up with Diesel 10 to locate stones belonging to a crown the man stole from his world. The stones are hidden all across the island, and when fully-restored, the crown gives unlimited power fueled by the imagination of whoever wears it. This leads to Thomas meeting Brum, a small yellow car who knows this mysterious man as "The Shadow", a cunning thief and criminal mastermind. Brum and Thomas must now race against the villainous duo to save Sodor from The Shadow's wrath.
