After being missing for four months, not everyone is happy to see Ra Bong Hee, the lone survivor who can't remember anything about her ordeal.

Bong Hee starts to remember parts of the crash and what happened after. And she was not the only survivor of the crash.

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.

Tae Ho figures out what the rest of the survivors have been up to behind his back and is furious. Bong Hee regains her memory.