Julia Summers is on the hunt for the next big thing that will make her the envy of her friends and put her back on top. Enter Flame, the new boutique gym in her neighborhood. Seductive and transformative, Flame’s spin classes are exactly what Julia needs --- and demure, naïve instructor Tatum is her ticket in. But rebranding Tatum as a trendy guru proves hard work, and Julia’s triumphant comeback at summer’s end doesn’t quite go as planned. Her life is already spiraling out of control when her husband is arrested for fraud and bribery. As her so-called friends turn their backs on her, and Tatum pursues her own agenda, Julia is forced to rethink everything she knew about her world to reclaim her perfect life. But does she even want it back?