Brax will be brutally attacked outside Angelo's before being dumped in a forest by a group of thugs outside.
Steve Peacocke, who plays the eldest River Boy Brax, predicts that criminal father Danny could have ordered the attack.
"You'd think with father and son that blood is thicker than water, but that's why Brax is so afraid of him: he knows Danny would get rid of him in a heartbeat," Peacocke told TV Week.
"Maybe taking Brax out of the equation is his way of having a relationship with the boys. No-one knows how far Danny will go?"
Danny, who recently arrived in Summer Bay after being released from jail, manages to persuade Heath (Dan Ewing) and Casey (Lincoln Younes) that he is a changed man.
Peacocke added: "Danny is the one Brax is truly afraid of, because he's everything Brax could be but doesn't want to be.
"It's completely frustrating for Brax, because he knows what this bloke is all about, yet neither of his brothers will take his word for it.
"He argued with them at first, but he has to let them find out themselves, even though he's kind of unleashing the devil really." Get the Inside Soap magazine on your iPhone or iPad