August, 1723 -- Spider John Rush believes he has escaped piracy forever. Enjoying rum and chess in a dark Lymington tavern, he dreams of finding passage to Nantucket to reunite with his beloved Em and to finally get to know the son he remembers only as a babe in arms, though the lad must be dreaming of going to sea himself by now.
Spring, 1897. London. Margaret Harkness, now in her early forties, must leave England for her health but lacks the funds. A letter arrives from her old friend Professor Bell, her old comrade in the hunt for Jack the Ripper and the real-life inspiration for Sherlock Homes.