Lem arrives with two other members of the Brotherhood without Banners in an attempt to extort the band of villagers, which includes Brother Ray and Sandor Clegane. However, upon learning that the villagers hold nothing of interest he and his companions leave. He and other members of the brotherhood were responsible for the slaughter of the villagers, and the hanging of Brother Ray
Sandor hunts down Gatins, Morgan and their cohorts in a forest, killing them. Later he finds Beric Dondarrion and Thoros preparing to hang them for the unsanctioned attack on the village. They allow Sandor to hang Lem himself, who begs for mercy. Sandor takes Lem's boots along and is invited to join the Brotherhood's mission to fight up North.
A rogue member of the Brotherhood Without Banners, Lem raided Brother Ray's community.The Hound tracked him down to avenge the death of his friend.