Ben, Maddie and Ryn desperately try and keep the newly arrived mermaid pack hidden from the rest of the town, but the new mermaids' quick degradation on land forces them to get them back to the sea unnoticed during the town's Mermaid Beauty Contest. Elaine grows more suspicious of Helen and her connections to their family.

Ryn decides they need to find another solution for housing the mermaids, as hiding them becomes increasingly difficult. Ben becomes a mentor to Levi as he tries to learn how men behave on land, while Maddie continues to struggle with her mother's renewed presence in her life.