Sex, shopping, and sisterhood - for three young women in Manhattan, it's all about living life on top.

Sophie Steele, twenty-two and fresh out of business school, thinks she has it all: beauty, an MBA, and a high-powered job at a hedge fund in New York City. But Sophie's about to uncover a whole new life - a life filled with beautiful people, exclusive parties, and tantalizingly hot sex - when she moves into her older sister Bella's fabulous Tribeca penthouse apartment.

Bella Steele, a Penthouse Pet and Manhattan's hottest glamour model, can have her pick of rich, sexy guys...

There aren't many rules that gorgeous glamour model Bella Steele hasn't broken. However, there is one she's always observed: best friends should never compete for men, jobs, or real estate. When Maya Lin, the stunning Asian beauty Bella took under her wing when she began modeling, is named the Penthouse Pet of the Month, Bella's rule is challenged: the two friends find themselves rivals for the title of ultimate sex bomb - Pet of the Year. It's a trophy Bella's always wanted, and she's not about to take this challenge lying down. Maya has a few tricks up her garter herself, and New York...