Jim is the king of Gym Queens, the sexiest community in the Parisian Gay scene made of muscles, sweats and parties. Everything goes well for him up to the day he gets Heterosis, a strange new virus turning gay men into… straights! Stripped of his crown and abandoned by everyone except his last remaining follower, Lucien — a closeted young Twink — Jim must team up with him to crisscross the city in search of a mysterious cure. Their mission? Heal Jim... and save the LGBTQIA+ community from total extinction.