They’ve swapped Christmas – again. Can Hayley and James’ relationship survive another turbulent family Christmas or has their future together gone off-piste?!

Students Hayley and James are young and in love. After saying goodbye for Christmas at a London train station, they both make the same mad split-second decision to swap trains…

Three extraordinary stories covering infidelity, adoption, and a drug dealer turned actor intertwine as characters meet in the streets of London.