It's 1838, and Patrick and Grace Leary are aboard The Sirius, set to become the first ever ship to sail from Dublin to New York using only steam power. But their cousin Ben is on board Brunel's giant steam ship the Great Western in Bristol, and he's convinced he'll be in New York before them.

With fires causing havoc, Brunel getting injured and one ship running out of coal, which steam driven sea monster has the power to win this dangerous race?