It's Open Week at the Academy and Tara discovers she is embarrassed by her unsophisticated parents, especially around her new boyfriend Ethan. Her mum later reveals that the farm is in serious financial trouble.
Tom is out of control so Rhydian, Shannon and Jana turn to Segolia for help.
Jana, Tom and Shannon go to Segolia where Tom discovers something mysterious and terrifying that changes his life.
After Kuru reports Alex still doesn't concentrate on her magic training, Omar invites her. The elders decide to hold a banquet, Vashan prepares a snake venom-drink. Alex misses the appointment because she prefers to play with her band in a talent competition they only make trough her magic abuse.
When ZOEY escapes the washing up to recharge her energy, AMBER and KIKI think nothing of it – until a big burst of lightning strikes their house. Rushing upstairs, they find ZOEY gone.
On the night of the full moon, Veridia tells Ondina to protect her class of little mermaids – and that all of them should stay away. The mermaids disobey Veridia and join the pod.
Weilan reveals an Eastern mermaid power called ‘Turn the Tide' and Zac thinks he can use it against the dragon. Evie discovers Zac and Weilan practising ‘Turn the Tide' in secret.
Will seeks confirmation of his first experience on Mako Island. Bella volunteers to misdirect his search so he won't find the Moon Pool.
Cleo and Rikki face their final year of high school without Emma. They make a new friend in Bella and meet new boy Will.
The full moon rises, and with the planets lining up, this full moon can remove mermaid powers for good. Cleo and Lewis are boyfriend and girlfriend again. Charlotte clashes with the girls, using her superior powers. When the girls come under another mermaid attack that night, Lewis lures Charlotte to the moon pool in order to remove her powers.
Cleo is having some problems on the home front keeping her secret about being a mermaid. Meanwhile, Charlotte gives Lewis an ultimatum about spending time with Cleo and the others. When Lewis struggles to fob Cleo off, Charlotte steps in and bullies Cleo with her superior mermaid powers.
Tara returns from the holidays excited to have been awarded the first year scholarship. However, this soon turns to disappointment when Kat leaves her standing alone outside a warehouse party the night before their first ballet class.
It's Open Week at the Academy and Tara discovers she is embarrassed by her unsophisticated parents, especially around her new boyfriend Ethan. Her mum later reveals that the farm is in serious financial trouble.
Tom is out of control so Rhydian, Shannon and Jana turn to Segolia for help.
Jana, Tom and Shannon go to Segolia where Tom discovers something mysterious and terrifying that changes his life.
After Kuru reports Alex still doesn't concentrate on her magic training, Omar invites her. The elders decide to hold a banquet, Vashan prepares a snake venom-drink. Alex misses the appointment because she prefers to play with her band in a talent competition they only make trough her magic abuse.
When ZOEY escapes the washing up to recharge her energy, AMBER and KIKI think nothing of it – until a big burst of lightning strikes their house. Rushing upstairs, they find ZOEY gone.
Overflown with emotions Alisa has to confide in Lars and Ivy about what is going on with her. Inspired by the openness of Alisa, Ivy tells her about how she and her brother Seymour ended up on the ship. They know Tonka is on a mission to steal the rubies. Hindrik sends Raphaëla to check if the rubies are safe. They're not. Raphaëla gets into a fight with Tonka.
Ondina blames Weilan for the dragon taking Evie's tail. Feeling responsible, Weilan considers leaving Mako, but some sage advice from Uncle Shen helps her reconsider.
Overflown with emotions Alisa has to confide in Lars and Ivy about what is going on with her. Inspired by the openness of Alisa, Ivy tells her about how she and her brother Seymour ended up on the ship. They know Tonka is on a mission to steal the rubies. Hindrik sends Raphaëla to check if the rubies are safe. They're not. Raphaëla gets into a fight with Tonka.