In Saint Denis, France Jack (played by Eddie Redmayne) learns of Euclidean geometry
which provides him with the key to building a stone structure that can withstand its own weight.
Aliena (Hayley Atwell) with the baby have been searching for him and find him there.
They decide to return to Kingsbridge but while waiting for transport in Cherbourg he
discovers his father's family and learns that his father was on the White Ship that burned
and killed Prince William, the heir to Henry I's throne and King Stephen's predecessor.
Philip (Matthew MacFadyen) refuses the new position Waleran (Ian McShane) offers him.
Jack returns to Kingsbridge. He wants to re-start the building of the cathedral, and bring a
statue, the weeping Madonna with him, to collect money for the cathedral building.
Waleran and the Hamleighs plan another attack against Kingsbridge, but this