Charlie begins a painful journey of withdrawal from drugs, surprisingly aided by Locke, whose true motive for helping Charlie is a mystery. Meanwhile, survivors struggle to find and free Jack when he's buried alive in a cave collapse, and someone might be secretly thwarting Sayid, Kate, and Boone when they enact a plan to find the source of the French transmission.

Sayid's life is placed in grave danger after he stumbles upon the source of the mysterious French transmission. Meanwhile, Hurley has a ridiculous plan to make life on the island a little more civilized - and it just might work.