Samantha and Annie Callahan are successful doubles champions-the toast of the Olympics, Wimbledon and Flushing Meadow. But their winning partnership spirals out of control when Annie's new boyfriend announces their engagement at the Australian Open in Melbourne.He persuades her to ditch Samantha in favour of a singles career, but her game and rankings plummet.Samantha is left floundering. Disillusioned, her only sweet spot is the growing passion between her and Bear, the sisters' coach.Amidst rising anger and betrayal, Samantha changes both their destinies when she does the unthinkable after a devastating Wimbledon loss.The sisters are driven to create new lives by confronting the past and taking control of the present. But can Samantha and Annie both win? 'Courtney hit a couple of lucky shots.' Samantha Callahan (feisty, after losing 6-2 to Courtney Gold) 'You only live once, but you get to serve twice.' Annie Callahan (philosophical wisdom, after her Wimbledon defeat) 'I'm beautiful, famous and gorgeous. Everything both Callahan sisters aspire to be.' Courtney Gold (smug, Minty Mouthwash spokesperson and sometime tennis player) 'No comment. I've coached all three.' Bear Devlin (unruffled uber coach - clarification: Devlin is a super coach, not a bus driver for hire)