America.
A hidden letter.
Family secrets.
And Alf - determined to uncover them.
New Zealand.
A forgotten tin trunk.
An old coin.
And Abigail - searching through ancient documents.
What were her ancestors hiding? Something dangerous, it seems.
Suddenly, Abi is hurled back in time.
She comes to, sprawled on the floor of a strange room.
A boy in old-fashioned clothes is looking at her in shock.
He's holding a letter - one she's just read.
They pool their knowledge.