Nadia Kaminski knows very little about her Polish grandfather so how is she going to write a speech about him to read at his funeral? She's never really considered her Polish roots, so a trip back in time to time (to the end of the Second World War) and an encounter with Marcel, a Polish refugee, might be just what Nadia needs. Along with fellow time-travellers, Jess, Tomma and Ash, this is the group's second experience of Hickley School in the past, and a chance to discover the struggles of those who found themselves stranded in a country that wasn't their own. It's time to board the train for another exciting journey back in time.