The shadow of Weng-Chiang, an original novel reaturing the fourth Doctor, Romana and K9. The search for the fourth segment of the key to Time brings the Tardis to 1930s Shanghai: a dark and shadowy world, riven by conflict and threatened by the expansion of the Japanese Empire. Meanwhile, the savage Tongs pursue their own mysterous agenda in the city's illegal clubs and opium dens. Manipulated by an elusive foe, the Doctor is obliged to follow the Dragon Path-the side-effect of a disastrous experiment in the far future.