A team of celebrities train for a cross-channel relay swim in support of Stand Up to Cancer, under the coaching of Olympic swimmer Keri-Anne Payne and adventurer Ross Edgley. The team consists of athletes Linford Christie, Tessa Sanderson and Greg Rutherford, Coronation Street's Sair Khan, The Last Leg's Alex Brooker, TOWIE's James Argent and Georgia Kousoulou, Blue singer Simon Webbe, Love Island's Wes Nelson, Hollyoaks actress Rachel Adedeji, and presenter Diane Louise Jordan