The Summer Bay actor told TV Week that his alter ego will become Danny's ally in an attempt to learn of his devious plans before they come to fruition.
Nasty Danny Braxton (Andy McPhee) has begun to charm Ruby with the knowledge that she has access to her late mother Charlie's inheritance money.
Younes said of the plot: "Casey is quite smart and wants to keep Danny close to him and get on side with him, because if he is doing the dodgy, which he certainly shows tendencies of, then at least Casey will be on the inside.
"Danny is trying to manipulate Casey in a way that [will help him] extort Ruby for the money. Obviously Casey pulls up at this and the alarm bells are ringing."
Casey later manages to convince older brother Brax that his plan to stay close to Danny will work.
Younes was coy on where the plot will lead, simply saying: "It's quite an intense storyline."
A promo for Home and Away's upcoming car crash and murder scenes suggest that Casey and Danny will play a central role.