Following a catastrophic industrial accident, the boys respond in their own ways: Marcus immediately seeks financial compensation, while Grumio prefers to 'go to seed' at home. Then Jason, a cheery out-of-work builder steps into their lives.

It's marathon time and the city's gone into a frenzy of fundraising. So when Grumio's mistaken as a charity case, Marcus spies a money-making opportunity. Jason bets Aurelius he can beat him in the big race despite not having run since junior school.