In adazzling, high-tech training hub known as the Idol Cosmos, 99 female trainees from three different regions: Korea, Japan, and Global, gather to compete for a spot in a new global girl group. Set in a space-themed environment, the show blends intense training, dazzling performances, and emotional storytelling. Divided into Planet Groups, each contestant must prove their star potential through missions, fan voting, and special "Connect" challenges that test teamwork across cultures. The top 9 trainees will debut in a temporary global girl group set to promote internationally. In a world where dreams are infinite, only those who shine the brightest will rise as stars.