Zoey Appleby is bored of her vanilla sex life, or lack thereof lately. So, when her friends dare her to have a threesome she's all for it, in theory anyway. It isn't until she's introduced to Heidi and Nathan's boyfriend, Rafe, that the opportunity comes knocking.
Rafe Zakas is hoping Zoey will consider being their fourth. He needs something more from his two lovers and Zoey is just what he thinks he needs to help him settle down. There is a void she seems to fill within him, and it's up to Zoey to decide if she's okay with their new found love and unconventional lifestyle, or will she stick to the life she's used to?