Fourteen-year-old Max Tovey's world is blown apart when he discovers that his problems are nothing to do with him, and everything to do with being a Time Traveller. Following his mysterious grandfather's funeral, Max finds himself on a wild journey through first century Celtic Britain, real and mythological, as his every action threatens to change the past, and his future. Max battles demons - both real and psychological - on his mission to find the legendary Montacute Cross, stolen by his Viking ancestor Tofig, in order to close the gates to the Underworld, and lift the curse on his family.