Musician and film-maker Cosmo Jarvis is urgently appealing for the return of a laptop computer and hard drive which contains the only copy of the test shoot for his next movie.
The equipment was in a rucksack stolen in the early hours of Wednesday from a fast-food restaurant in the German town of Cologne where the Devon artist played a show as part of his current European tour.
His first feature film, The Naughty Room – produced by Cosmo and a small team of friends in Paignton and Plymouth – was screened on BBC Four last year.
He self-funded a week of test shooting for its follow-up – working title Abandon Hope – and had been editing it on the move in the band's tour van.
"It's a big blow," said Cosmo, 23, from Frankfurt last night. "If I don't get it back, I'm going to have to start the whole project again from scratch."
The bag also contained headphones and Cosmo's insulin needles for his diabetes.