Grace Dent follows the story of a fourth generation Herefordshire beef farmer during his most stressful time: the TB Test. Matthew Oliver wants to sell around fifteen cattle at a local market, but to do this they have to be free of TB. It's a nervy time both for Matthew and his 87 year old mother - they have failed the test before. If the TB test is positive, cattle movement is banned for 120 days, the affected animals all culled. The farm, set up by his great grandfather in 1892, is in a high-risk area and Matthew knows local farmers who have never been free of TB; one neighbour was forced to leave farming altogether. So the stakes are high for Matthew, and the future of his family farm.