A young veteran returns from war and finds his world changed as he struggles to cope with the memories his service has left impossible to ignore. Private Frank Hasek, a young veteran of a foreign war, returns home to await his redeployment. While suffering from the strains of Post Traumatic Stress Disorder, he struggles to keep his job as an Army mechanic in order to support Marisa, the mother of his newborn son. He has maintained the vehicles that American troops have driven through occupied cities, often in a state of fright and at peril to civilians in their path. Unsettling visions of what he has seen and a series of unfortunate events threaten to upend his career and derail his relationship with Marisa. Although Hasek seeks help from an overworked psychiatrist at VA hospital, his behavior becomes increasingly erratic and threatens to turn violent when he discovers his most personal relationships are being affected. Reservoir parallels the plot of "Woyzeck" in dark and suggestive ways.