Bong Hee tries to recover more of her memories. Tae Young is anxious to uncover what happened to his sister and offers to help Bong Hee recover her memories.

The survivors have to decide where they should set up camp. Bong Hee takes a trip back to the island and remembers what happened to Tae Young's sister.

Tae Ho tries to decide which two people he should invite to join him. The lifeboat adventure does not go as planned and the survivors turn against each other.