Myah instructs her brothers to co-operate fully in the task of converting the Beast into a rain machine. Old rivalry sparked between Lyal and Sundance. Geneva tells Tod of her misgivings about bringing Thunderstone back into their lives. She's seen how harmful the valuable material can be when it falls into the wrong hands.

Noah, working under immense pressure, finally finishes converting the Beast. The Nomads and the Family pile into the vehicle and Noah transports them back in time, to the Valley of Chazon.

While the whole party is busy manoeuvering the Cube onto the Beast's roof, the brakes give away. Geneva is trapped in the ca and the Beast picks up speed and hurtles towards a cliff. She refuses to jump to safety and abandon the Thunderstone cube upon which the future of Haven rests. With quick thinking and courage she manages to avert disaster.

The Beast, with the Cube secured on its roof, is white-lighted back to Razorback Ridge in Haven. At Noah's command a great blue beam is thrown to the heavens. Clouds roll into the sky and amidst crashes of thunder and swirling winds, the rain begins. A lyrical montage shows us the animals relief, waterholes starting to fill and water trickling into dry creek beds.

Back in North Col, Becky and her parents are concerned. Structural damage is worsening but Syndia persists with the cover up. Liz plans to confront her at the next triumvirate meeting.

At the compound, Noah and the Nomads fall contentedly asleep. listening to the raindrops on the roof. But up on the Ridge, the family are silently taking possessing of the Beast. Rorden struggles to activate the machine — but why?

The next morning Arushka and Noah are out with Moshi, inspecting the relief on the land and animals when Moshie is spooked by Rorden, Lyal and Tod. As Arushka pursues the horse, Noah is Noah is taken prisoner.

Myah is waiting in the Beast and delivers Noah an ultimatum — he will take them to the Silver City in the year 2235.