Trapped underground in the darkness, Ryder's breath become ragged.
He has been lying inside a coffin, buried beneath the soil for hours and his calls to Theo have gone unanswered.
Unbeknown to him, Theo has fallen down a ravine on his way back to pull Ryder out from the grave. The only person who can help is now unconscious, and time is running out!
Will their foolish prank become Ryder's last moments?
In the terrifying season return of Home and Away, Ryder (Lukas Radovich) is losing oxygen – fast. As his phone battery dips, the teenager checks the live feed where their prank is streaming.
One viewer indicates he only has 19 minutes left before he runs out of air. Ryder laughs it off, not wanting to show his fear, but panic has set in.
"He realises when Theo stops answering the phone that it's no longer a joke and he's in serious trouble," Lukas, 27, tells TV WEEK.
Nearby, Theo (Matt Evans) wakes to find his leg trapped in barbed wire and his phone out of reach. He can't communicate to Ryder what's happened and his leg is in searing pain. No one knows their whereabouts and night has begun to descend upon them.
The prank, while dangerous, was a desperate avenue for Ryder to repay his family. Alf (Ray Meagher) and Roo (Georgie Parker) lent him money to build hi catering business, and when it failed, he vowed to pay them back. Now, it could cost him his life.
"After losing the food truck with no insurance, he has a strong sense of duty and responsibility and believes this is the only way to make enough money to pay everyone back," Lukas explains.
Back in Summer Bay, Alf and Justin (James Stewart) cross paths and ask each other the same question: "Have you seen Ryder and Theo?".
Surprised to hear that neither of them has come home, alarm bells ring.
Justin quickly finds Roo to check if she knows their whereabouts but she confirms his fears: they're missing.
Justin pulls up their video channel and finds the burial challenge. Roo recognises the area and the pair race to find them.
But it could all be too late. In the coffin, Ryder's phone slips from his hand and he loses consciousness.
Hang on, Ryder!