Angst is an independent film released in 2003, directed by Daniel Nettheim and written by Anthony O'Connor. The film is a psychological thriller that primarily focuses on the themes of paranoia, fear, and mental health. Angst stars Paul Conway in the lead role, supported by Fiona Horsey and Philip Hayden.

The film introduces us to the character of Dean, portrayed by Paul Conway, who is an introverted, talented cartoonist struggling to balance his personal and professional life. We are welcomed into his gloomy world where his art is his escape from a reality he is desperate to avoid. Conway gives an evocative portrayal of Dean, completely submerging his identity into the haunted character of Dean to give a firsthand exploration of his troubled mind.

Fiona Horsey potently portrays the character of Jade, a complete opposite to Dean in terms of personality. She is vivacious, adventurous, and vivacious. The chemistry between Dean and Jade forms a riveting tension that underlines their complicated relationship. As their lives intertwine, Jade's role becomes an influential factor in escalating Dean’s paranoia and fear which adds another dimension to the story.

Philip Hayden is Frank, Dean's supportive but unempathetic best friend who provides not only a heartening element in the film but also a voice of reason during Dean’s downward spiral. His character serves as a stark contrast to Dean, leaning towards rationality and reassurance as opposed to paranoia and fear.

The setting of the film is primarily centered around urban Sydney, portraying the hustle and bustle of the city. An essential element of the overall narrative, the city's life contradicts the silence that engulfs Dean, worsening his mental health conditions, and fueling his anxiety.

The film's cinematography plays a substantial role in depicting Dean’s mental state. Often, the film uses abstract and suspense-building camera angles, allowing for an atmospheric alignment with the film’s narrative focus. The jagged, quick cuts and unconventional shooting techniques offer a distinctive viewpoint into the protagonist's schizophrenic state.

The tone set by the overall narrative through its mise-en-scene, lighting, and sound effects helps in creating a gloomy and eerie atmosphere, mirroring Dean's insecurities and anxieties. The music perfectly complements the dark undertone of the film, featuring an austere and moody score by David Thrussell that encapsulates the paranoia and spiraling sanity of the main character.

The storytelling asks audiences to ponder the realities of living with severe psychological disorders. As audience members, we are provided with a harrowing look at Dean's descent into paranoia and fear, with the character-centric design of the film serving as a slow-burning exploration into his psyche.

Angst is an intense experience and not a casual watch. The film does not shy away from broaching the topic of mental health, dealing with it in a raw and often uncomfortable manner. It's a dark, psychological exploration that is unflinching in its depiction of the complexities of the human mind.

The film has an open-ended narrative that leaves inclined viewers with much to interpret and debate in the context of the storyline and the individual characters. It is gripping in its storytelling, unfolding at a deliberate pace that slowly reveals the world through Dean’s eyes. Its shocking realities make it an uncomfortable watch at times but necessary in today’s age where mental health often takes a backseat.

With its unique storyline and brilliant execution, 'Angst' fosters a novel sense of suspense, marking its place in the psychological thriller genre. While it may appear bleak and haunting, this film provides an introspective look into the human mind, making it a worthwhile choice for those interested in understanding more about mental health issues.

To fit with its theme, Angst does not follow a conventional storyline. There is a prominent focus on the state of the protagonist's mind rather than a built-up climax to provide complete closure. The film retains its charm through the depth of its character's personalities, the complication of human relationships, and a compelling twist on the psychological thriller genre.