In It's a Girl Thing, readers are introduced to Ronnie, Fleur, and Claudette, three best friends who are determined to enjoy their teenage years to the fullest. When their parents forbid them from attending the much-anticipated Astlebury Music Festival, the trio takes matters into their own hands by planning a music festival at Blackwell School. Their journey is filled with humorous escapades, teenage drama, and the challenges of balancing friendship with the pressures of growing up.