Ireland's Holocaust, The Great Famine, almost destroyed the Green Country, and millions starved to death.
In perhaps history's biggest diaspora, many escaped and only New York took more Irish immigrants than Glasgow, Scotland.
But, had they not come, Glasgow would never have become The Second City of The British Empire, the world's biggest.
The Irish also built Celtic Football Club, one of the most famous and successful in the world, in a city of abject poverty and racism, amidst history's most turbulent period.
The Fenian is an epic, factional, fun-packed story spanning four generations from 1887, the year Celtic FC were founded, until 1967, when they won the coveted European Cup.
Innocent Irish farm-boy Micahel Dillon buries his beloved mother who gave him 'Going to America' gold coins. He escapes on a coffin-ship, but is tricked, and finds himslef in Glasgow.
There, he's attacked by brutal bigot Guthrie, who stamps his hand so he can't steal work.
But, Michael can sing, and entertains Irish volunteers as they build Celtic Football Park to raise money for starving children.
This is Michael's story, and the story of how bigotry came to be in Glasgow.
He struggles to survive in Wee Dublin, right opposite Wee Belfast, while trying to save money for America.
And, when he marries Guthrie's Protestant sister Alanna and raises a family, he must fight bigotry too.
With humour, pride, passion and hope in his heart, can he overcome his struggles...