With a little bit of sand in pockets, the Travelling Pants and the Sisterhood that wears them are back - and ready to embark on their 16th summer . . . Lena's in love - but will it end in a broken heart? Bridget: She's about to face up to some painful truths about her late mother . . . Carmen: She's hoping destiny will play her cards right - for once! Tibby's going to film school - so will she be star of the show?