The Fifth and Sixth Keys

The Maya exploring party continues to explore Tulum. They visit Cenote Lol-ha and have a good time exploring the sacred spring of Maya. However, Juyeon unexpectedly comes down with a cold. To invigorate their youngest member, Seung-won and Sung-kyun attempt to recreate Juyeon's favorite food, jjamppong, in Mexico, using ingredients from the Mayan sea.