In tennis, as in life, nothing ever goes truly to plan. 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. Bear, the sisters' coach, guides Annie as much as she'll allow. But when she insists on dropping Samantha in favour of a singles career, her game and rankings plummet. Samantha is left floundering. Disillusioned, her only sweet spot is the growing passion between her and Bear. Amidst rising anger and betrayal, Samantha completely 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?