The site known as Gerry's Pompeii was a one-bedroom ground-floor flat, and canal-side garden, occupied by Gerald Dalton from 1983 until his death in 2019. Entirely transformed by him into a unique landscape of handmade sculptures and architectural models, it referenced the shared histories of the UK and his native Ireland. As neighbours and friends campaign to keep Gerry's Pompeii in situ, this film investigates the poignant mystery of what inspired him.