When a routine off-world science mission comes across a mutilated Wraith carcass the team suspects Ford may be involved. Intrigued they split into teams to investigate. Teyla (Rachel Luttrell) and Sheppard (Joe Flanigan) encounter Ronon Dex (Jason Momoa) a fierce warrior who survived a battle with a Wraith seven years earlier and has been on the run ever since. When Dex reveals to Teyla and Sheppard that Ford (Rainbow Sun Francks) has taken up residence on the planet they enlist his help to locate their friend. The duo hope to rehabilitate Ford to his former state. McKay (David Hewlett) eventually stumbles upon the increasingly incoherent and maniacal Ford and tries to reason with his former colleague and friend. However McKay begins to see how far gone Ford has become -- addicted to the enzyme injected in him by the Wraith who attacked him Ford has been brutally killing Wraith to get a fix of the solvent. Reluctantly McKay and the rest of the crew must face the realization that they may never be able to save Ford from what he has become.