San Andreas follows the gripping story of a British hospital ship during World War II. The vessel, marked with Red Crosses, should be protected — but mysterious sabotage, relentless U‑boat attacks, and deadly weather turn its voyage through Norwegian waters into a tense fight for survival. When most senior officers are killed and the captain incapacitated, bosun Archie McKinnon must steer the crippled ship to safety while uncovering the traitor among the crew and resisting enemy threats.