Two luscious sisters (Stefania D’Amario and Barbara Magnolfi) grieving over the death of their father retreat to a seaside hotel, only to find themselves victimized by the resort’s sexually twisted inhabitants, including a killer whose weapon of choice is a monstrously large sex toy. In classic sleazy Italian giallo fashion, lesbians, perverts and others busily engage in kinky carnal episodes as the sisters fight for their lives.
"The Sister of Ursula" hit theaters right as the giallo was beginning to wane and it shows in the desperate nature of the production. Just about everything you'd expect to find in your prototypical giallo is here - dreamy soundtrack, scenic Italian locales, black-gloved killer on the loose, and sex served up as a prelude to murder - only this time with a lot more pubic hair. The graphic sex frequently borders on pornography, which may come as a shock to giallo fans. Genre purists might want to steer clear: I'd honestly have an easier time recommending "Ursula" to fans of 70's era pornography, back when adult films had cinematic lighting and detailed plotlines.