After the explosive events of The Lion Lies Waiting, life has returned to normal for burly fisherman Robin Shipp. That is until the innkeeper of the ancient Moth & Moon approaches him with a surprising proposal, and an unexpected arrival brings some shocking news that sends Robin on a perilous journey alone.

While he's away, his lover, Edwin, anxiously prepares for the birth of his first child with his friend, Iris. Her wife, Lady Eva, must travel to Blackrabbit Island for a showdown over the future of the family business. Meanwhile, Duncan nurses an injured man back to health but as the two grow close, the island's new schoolmaster makes his amorous intentions clear.

Robin's search for answers to the questions that have haunted his entire life will take him away from everyone he knows, across a dangerous ocean, and into the very heart of a floating pirate stronghold. Pushed to his limits, Robin's one last chance at finding the truth will cost him more than he ever imagined.