Seasons 1
The initial series spins to Emma Gilbert, Cleo Sertori and you may Rikki Chadwick, that turned into mermaids. It get a hold of the incredible efforts more than liquids – Cleo is also handle the design and you will quantity of liquid, Emma can also be freeze they, and you may Rikki can also be boil they. Lewis McCartney, a buddy out-of Cleo – and later of the three ones, assists them from exposure. So it collection means Rikki, Emma and you can Cleo understanding how to have fun with their energies and dealing having everyday dilemmas. Cleo fits Louise Chatham, who had been a beneficial mermaid and you may who warns the girl, Emma and you may Rikki regarding the full-moon. Zane Bennett try swept up during the Louise’s sinking boat and you will Emma features to keep your. Zane observes the woman end and you will appears almost everywhere close Mako Island for the brand new “sea-monster”. Zane sees Emma as a mermaid, but don’t admit the woman since she got red-colored hair. Rikki and you may Zane getting a couple. At the conclusion of the year, Zane assists Dr. Denman grab the brand new mermaids. Zane discovers exactly who new mermaids is and you may rescues all of them with Lewis’ help. Into the lunar eclipse, girls treat its energies, only for 12 period, but it was sufficient getting Dr. Denman to reduce need for them.
Seasons 2
A complete moonlight together with a rare planetary alignment phone calls the girls for the moonlight pond from the Mako Area in which their efforts and you can abilities are significantly enhanced and you may strengthened. The following year revolves within the arrival from another type of girl, Charlotte Watsford, who’s only moved to the neighborhood and you may increases an interest getting Lewis. Immediately after Charlotte sees a film out of the woman granny Gracie once the a good mermaid she match Max Hamilton who was shortly after romantically associated with Gracie. Charlotte trip to your moon pool throughout the full moonlight and you will becomes the fresh new last mermaid into the arms of all girls’ vitality. Assuming herself advanced while the one to “correct mermaid” she plus the ladies end up being pledged enemies. So it conflict results in a conflict, throughout an especially good and powerful full-moon, and that finishes having Charlotte are permanently removed out-of the lady mermaid powers and you will mermaid form. The girls likewise have personal entanglements. Cleo vacation trips up with Lewis if you are too clingy and you can protective and then the guy times Charlotte. Rikki and you may Zane initiate relationships once more once separating for the series that finale. Emma suits Ash, but he could be frustrated by all the treasures the woman is usually hiding. Ultimately Emma confesses in order to him you to definitely she’s an effective mermaid. Meanwhile, Lewis are conflicted between his loved ones and you may Charlotte, in the finish he comes to the end one his support is to ladies, and you can Cleo. Lewis decides to split-with Charlotte and restart their reference to Cleo.
Season step 3
It’s nearly the conclusion the summer 
months vacations and you will Cleo and Rikki go for about to face the this past year out of high-school instead of Emma, who has went to another country. As well as Lewis, they might be confident they are aware exactly about Mako Island. But when drinking water episodes the girls into an entire moon, they understand an alternate, potentially dangerous push was developing, and can, a child having freakish 100 % free-dive feel whom stumbles upon brand new Moon Pool you can expect to support the the answer to understanding the strong time. Thankfully it see a friend during the Bella, a different woman in town exactly who shows she too is actually a great mermaid having over the top energies. Along with her, new threesome face enchanting demands because they discover black secrets regarding Mako Area and you can read its future as mermaids.
H2O: Simply Include Liquid: The movie
This Television flick described new occurrences of your own start of Season 1, superimposing the fresh new attacks: “Metamorphosis”, “Pond Cluster”, “Hook throughout the day”, “Party Lady”, “Lovesick”, “New Denman Affair” and “The latest Siren Perception”.