Ruby is generous, sunny and funny - which is why all her friends, family and colleagues have turned up to celebrate her 50th birthday. But with a few too many glasses of champers under her belt, Ruby's speech doesn't go exactly to plan. Instead of the witty and warm words guests are expecting, Ruby takes her moment in the spotlight to reveal what she really thinks of them. Shocking them all, she also accuses her husband, Harry, of having an affair, and reads to the audience the evidence she found on his phone that very morning. And, saving the best till last, Ruby lambasts her calculatingly cruel mother for spending her life playing her three daughters against each other. It's blisteringly brutal. As the stunned gathering gawk at Ruby, the birthday girl concludes her bravura monologue with the throwaway comment that she has terminal cancer. She has cashed out her life savings and plans on taking her two sisters cruising until she dies. Only, do they really want to go with her? And, was it her medical results she read?