McKay and Ronan, each unaware of the other's motive, volunteer to assist Dr. Jennifer Keller with a medical follow-up away from Atlantis. But once in the settlement, a nervous child patient prompts Keller to ask Ronan and McKay to wait for her in the local tavern while she finishes her treatment. Later, when the pair return, they are surprised to learn that she left sometime ago. An exhaustive search of the village turns up no sign of her. But a set of footprints in the dirt just past the village confirms Ronan's mounting suspicion that Keller has been kidnapped. Ronan, wasting no time, begins to track her abductor while McKay runs back to the stargate to radio for assistance. But just as he reaches the DHD, four Hunter Wraith come through the gate and fan out in separate directions. Ronan, knowing full well that these Wraith exist to chase Runners, suspects there is a connection to Dr. Keller's disappearance. And he knows he must draw on his uncommon skills as a former Runner if he is to save her.