Where does lyla and nixie go for the 2nd season of mako mermaids?

In the second season of "Mako Mermaids," Lyla and Nixie travel to the mainland to find a new mermaid named Sirena. They aim to protect Mako Island's magic from the new mermaid and the growing threat posed by humans. The season explores their adventures and challenges as they navigate their responsibilities as guardians of the magical waters.