In 1981, two musical legends gather at a Scottish cottage on the Mull of Kintyre for a tense summit surrounded by the smell of breaded vegetarian food and the whiff of a potential Global Smash hit single.

The Los Angeles-set tale follows Ronnie, a man who runs a Disco Walking tour along with his browbeaten son, Brayden. When a sexy, alluring woman comes to take the tour, it begins a competition between father and son for her attentions. It...