Wounded and betrayed, after being dumped by her girlfriend, Ally makes off to her dad’s in Sheffield with the one thing that might soothe the pain and force her ex to speak to her again: Emily's cat, Malcolm.

Back home and forced into a 'date' by their parents, Ally and her first ever beard, Jeremy, come up with a ridiculous plan to win their exes back... to revenge-run a half marathon. Given neither of them can run, they enlist the support of athletic, not to mention beautiful, Jo. But will she have them running for the hills... or will their ridiculous plan pay off...?