The Marai are an underwater race of beings that depend on a moonstone which has to be retrieved by The Tidecaller. The Tidecaller had too go to the depths of the sea to collect a pearl. This time The Tidecaller is Nami. She is confident in getting the stone to save her people, but what happens when The Bearer of the moonstone doesn't show up?

In an alternate universe where Ionia was ruled by Demacia. Ionia has claimed its independence, but is struggling to retain it. It is up to Ionia's guardians and small army to defend the island from the bloodthirsty warlords from Demacia. The most loyal of the guardians is finding it difficult to stand for what she believes, but is willing to fight till the end.