A thriller and love story set in 10th-century Japan. 

Lady Shonagon is an imperial courtesan, living at the court of the Japanese Emperor in the 10th century. When a series of disturbing thefts within the palace walls throws the court into confusion and unrest, Shonagon is appointed guide and assistant to Lieutenant Yukinari as he investigates. 

Together, Shonagon and Yukinari must solve the mysteries and escalating crimes that plague the Japanese court, and their romance blossoms in the tightly enclosed world behind the high palace walls. But soon Shonagon's lover Tadanobu becomes uncomfortable with how closely they are working together....

The Pillow Book is inspired by the writings of Sei Shonagon, a poet and lady-in-waiting to the empress of the 10th-century Japanese court. The work of the real-life Sei Shonagon consists of essays, lists, anecdotes, poems, and descriptive passages about her daily life. 

This full-cast drama stars Ruth Gemmell as Sei Shonagon, with Yukinari played by Mark Bazeley in series 1-3 and Cal Macaninch in series 4-11. Benedict Cumberbatch plays Tadanobu in series 1. 

Directed by Lu Kemp.