The Long Ships is set in the late 10th century and follows the adventures of Orm, known as "serpent," called "Red" for his hair and his temper, a native of Scania. The story portrays the political situation of Europe during the later Viking Age.

Explore Andalusia under Al-Mansur Ibn Abi Aamir, Denmark under Harold Bluetooth, and the struggle between Eric the Victorious and Sweyn Forkbeard of Denmark. Journey through Ireland under Brian Boru, England under Ethelred the Unready, and experience the Battle of Maldon.

All this unfolds against the backdrop of the gradual Christianisation of Scandinavia, contrasting the pragmatic Norse pagan outlook with Islam and Christianity.