The film concentrates on the life of Georgi Asparuhov–Gundi, unfolding against the political landscape of Socialist Bulgaria, from his first meeting with his future wife to his tragic death in 1971.

Gundi – Lengend of Love now leads the Bulgarian top 20 all-time openings list, marking it the highest-grossing debut in the history of Bulgarian cinema, beating Fast & Furious 10 (2023), with 571,721 EUR / 1,118,190 BGN, Star Wars: The Force Awakens (2015) with 557,489 EUR / 1,090,355 BGN, and Avatar 2: The Way of Water (2022) with 532,032 EUR / 1,040,565 BGN.

The previous top-grossing Bulgarian film, Dimitar Mitovsky’s Mission London (2010), now trails significantly behind, having drawn 46,291 admissions and earning 181,569 EUR / 355,120 BGN in its opening weekend.

Gundi– Legend of Love is produced by Ivan Hristov and Andrey Arnaudov through the Bulgarian production company Medium Station. The total budget is 2 million EUR, which consists of 418,000 EUR received from the cash rebate scheme of the Bulgarian National Film Center. Additionally, 46,000 EUR has been granted for distribution support from the Bulgarian National Film Center.

Mission London is a coproduction between Bulgaria, UK, Hungary, North Macedonia and Sweden. It was produced by SIA Advertising in coproduction with Fidelity Films, Cinematrix Film, Premiere Picture and Dream Factory Macedonia, with the support of the Bulgarian National Film Center, Új Budapest Filmstudio, the Macedonian Film Agency, Film i Väst and Eurimages.