Movie where boy is buried and breathes thru a straw

After young Mary Gibson discovers that her older sister Jacqueline has disappeared, she leaves her boarding school and heads to New York City to track down her sibling. But Mary gets drawn deeper into the mystery.

Bastien Grimaldy, a man driven to heightened anxiety as the plot against him begins to take effect. Bastien's personal relationships give him enough cause for anxiety -- between his new lover Laura and a feisty mother, life provides its own insecurities. When he goes to the police with his problems, Bastien is assigned an off-beat inspector to protect him but is still faced with skepticism about his dilemma.