A group of 24 Challenge All Stars reunite to play for $300,000 in a individual game where relationships matter, and anyone can win; a comeback player makes a splash in their long-awaited return but fears that with success comes a target.
The game gets real when a pot-stirring player pushes another to question their desire to stay in the game; warring exes wonder if they should resolve their differences in the Arena; an old-school player teaches a fledgling All Star a valuable lesson.
A heated confrontation over a rumour puts one All Star's game on the line. A shocking departure brings a true Challenge OG into the house. A power player flexes their political muscle, forcing old friends to battle it out in the Arena.
The girls' room receives hurtful notes from a mysterious player, throwing their game into chaos. Meanwhile, Victor and Shane's bromance fractures.
The true strength of players in the game is put to the test when one of them falls ill. Meanwhile, Kayleigh is tired of her vendetta against Melissa, who sparks a fight in the house.