From the official CBS site:
Two Survivors battle to provide for their tribe. One brings home a clam; one brings home a shark.
Sitting out a Challenge, one Survivor finds it hard to watch from the sidelines and doubts the tribe's ability to win.
A tribe member is suspicious of a potential alliance forming between two very friendly tribemates that could spoil a game plan.
During a crucial Immunity challenge, one Survivor takes over for a struggling tribemate. Will it be enough to win?