On the way to Tahiti, the team’s plane crashes on a deserted island after a battery in one of the wave-powered generators explodes, causing shrapnel to cut the plane’s hydraulic lines. Everyone except for the pilot, Scotty (Rockmond Dunbar), is unharmed. Scotty is suffering from crush syndrome and will die if freed. The team rushes to build a makeshift dialysis machine out of the wreckage to save him, while also trying to find a way off the island. In the meantime, Sylvester’s near-death experience instills him with a new surge of confidence and Toby learns some surprising secrets about Happy’s past. Also, an overeager Walter struggles with his emotions while adjusting to his new relationship with Paige and Ralph is worried the relationship won’t survive long on the island.