John begins his journey on a mission – trying to locate the true source of the Shannon, while legend and current literature mark the source as the Shannon Pot in Co. Cavan, John meets with hyrdro-geologists performing a dye tracing experiment to find the true source of the river. With pick axe in hand John is put to work as he visits the Arigna Mines on the shores of Lough Allen, with former miner Maurice Cullen, and learns of what life was really like underground. Acclaimed wildlife enthusiast Colin Stafford- Johnson and John listen for the natural sounds of the river Shannon’s symphony of birdsong and Pat McManus and his team of divers from the Athlone Sub Aqua club investigate an unknown ship lost to time on the lake bed of Lough Ree for many years.