We still aren't certain what the chamber will do.
Pretty sure the mermen didn't build it to hang their paintings.
I'm so sorry about Erik.
I didn't think he would do that.
Well, he did.
He's got the Trident stone,
and now everything we've done has been for nothing.
Come on.
Move.
Give it a rest.
Try again later.
It's full moon tonight.
Erik's gonna activate the chamber, and I'm useless.
Zac, this isn't about whether or not you've got powers.
It's about you standing up for what is right.
Thanks, coach.
We must find a way to stop Erik.
The chamber is connected to the moon pool, and the moon pool is a part of us.
So, if Erik activates the chamber, we could be affected.
Ondina, Erik cares for you.
Maybe if you spoke to him, you could talk him out of it.
I'm not talking to him.
I don't think you have a choice.
Sirena's right. You're the only one he'll listen to.
Come on.
It's time you use some of that famous Ondina charm.
I didn't think you'd want to see me.
Why did you do it?
The only way to make the chamber safe is to control it.
Zac isn't going to use it, so I had no choice.
Rita believes the chamber is dangerous to mermaids, to us.
Of course she does.
She's old school. Mermen are the enemy.
You know I'd never hurt you.
Then don't go to Mako tonight.
- You said you cared about me. - I do!
Then let it go!
The chamber belongs in the past. It should stay there.
You want your home back, don't you?
You know I do.
Then let me give it to you.
What if I talk to Erik?
- Make him see some sense. You think?
Anyway, he's not likely to show his face till the full moon tonight.
Or not.
Relax, Zac.
I'm not here to hurt you.
The chamber was built for mermen.
You will always be welcome.
Don't do it, Erik. It's too dangerous.
Sorry, Zac, but tonight we're going to see what that place can do.
Zac's with Erik. He's in trouble.
Stay away from Mako tonight.
All of you.
Zac!
Don't let Erik get to you.
We'll find a way to stop him.
You can't possibly think that. You saw what he did to me.
We have to try. - Well, you have to do it without me.
You can't give up, Zac. - Why not?
What can I possibly do?
Go on, tell me!
I never really liked Erik. Now I like him even less.
Problem is, if he gets the chamber running,
we may have to act like he's the greatest guy in the world.
That is not a world I wanna live in.
How's Zac?
What Erik did really shook him.
He's given up.
Do you remember when we used to go fishing on Mako?
As far as we knew, it was...
just a place to get eaten alive by mosquitoes and eat half-cooked fish.
We had no idea what Mako really was.
And now we do, and we can't ignore it.
- Cam— - Your ancestors built that chamber.
It belongs to you, not Erik. You're special.
I can't even move a blade of grass, let alone take on Erik.
Are you seriously gonna roll over and let him win?
Okay.
Maybe you're right.
Maybe it's not possible to stop Erik.
Maybe he deserves to win.
Maybe you're not so special after all.
I'm sorry, Evie.
I tried.
Zac can't help us.
Then we must do what mermaids have always done, help ourselves.
We know Erik is gonna go to the chamber, so why don't we just take him on?
- We have moon rings. - I don't think it's gonna be that easy.
Erik has his own powers,
but he also has Zac's powers in the Trident stone.
Veridia believed that the way to destroy the chamber
was while it was being activated.
If that's true, then we need to be in there with him tonight,
during the full moon.
There's a possibility that if we do that, Mako could be destroyed.
If we want our home back,
we don't have a choice.
Didn't expect to see you here.
I couldn't keep away.
You're going to try and stop me.
You said this was a merman place, you said I would be welcome.
Even without powers, I'm still a merman.
Welcome.
Hi.
Can I talk to you a minute?
Sure.
If I told you a secret, the biggest secret you'll ever hear,
could you keep it?
Of course.
That's all I wanted to hear.
What about the secret?
If all goes well, tomorrow.
There's a chance we won't succeed.
It doesn't matter. Mako is our home.
We have to fight for it.
It's time.
You feel it, Zac?
We're at the crossroads of history.
Zac's not in his bungalow!
I think he's gone to Mako.
The mermaids will be there soon.
- I'm going, too. - No!
- Erik's too powerful. - I can't abandon Zac!
Trust the mermaids.
- Mimmi? - We have to hurry!
I thought you were smarter than this, Zac!
Don't you see what I'm trying to do?
You are going to destroy the mermaids!
I'm protecting them!
Once I'm in control of the chamber, they'll be safe!
Now we'll see what this place does.
Erik, no!
Destroy the stone.
It's absorbing our powers!
- Ondina?
Rita!
What's wrong?
The mermaids have failed.
How do you know?
The chamber is drawing the magic from the moon pool, and from us.
It will destroy us.
Erik, shut it down!
Zac!
Help me. I need to shut it down.
Zac!
Zac...
Zac!
Help him! Use your moon rings!
We can't. The stone took all their power.
You have to do something.
Zac?
No.
Don't give up, Zac!
Please, Zac.
Don't leave me.
Come back.
Zac!
Hey, sis. What's happening?
I'm so sorry.
I never meant that to happen.
Is there a chance you could forgive me?
You had a choice... me or the chamber.
You chose the chamber.
We could start over...
forget this all ever happened.
I'd always be wondering if you'd choose something else over me.
Goodbye, Erik.
Ondina!
Hi.
Remember that secret I mentioned?
I've wanted to tell you this for so long.
Are we okay?
Better than okay.
So I heard you guys saved the world last night.
I wouldn't go that far.
But, yeah... we did.
So, why didn't the chamber affect you?
I guess being a half-mermaid has its advantages.
Works for me.
Ugh, enough already.
Where's a menu around here when you need one?
- You've got your magic back.
Good as new.
Zac,
you have shown it is possible for mermen and mermaids to live in peace.
For that, we thank you.
Evie, you too have shown great courage and selflessness.
Well done, Evie.
You are the first land girl ever to receive this honor.
Sirena, Ondina and Mimmi.
When you first ran away to save Mako, I had no faith you could do it.
I was wrong.
You have reclaimed our home.
You have shown us there are land people we can trust
and who will keep our secret.
Perhaps in time, two worlds will become one.
I must go.
The pod will soon be arriving at Mako.
What are we hanging around here for?
The pod's coming home.