Two lives intertwined and seemingly harmonious. One decision that changes everything. Lizzie and Frances are twins, together forming part of a unit. Or at least that's the way Lizzie sees things. Lizzie is the twin who has everything: husband, children, a flourishing career and a beautiful house. She worries about Frances, who seems to lead a solitary life in London, ricocheting from one disastrous man to the next. Lizzie just wants Frances to have a complete and satisfying life, just like hers. Then one day Frances announces she isn't coming to Lizzie's for Christmas as usual - she's going to Spain instead. Suddenly and equally unexpectedly, Lizzie's world begins to tilt. Frances's Christmas defection seems overwhelmingly threatening to their unity. As Frances's future begins to change into something exciting and Lizzie's deteriorates as financial pressures eat into her ideal lifestyle, long held assumptions are called into question. Which twin really is the one with everything?