Director Ratchapoom Boonbunchachoke's first feature film gives fresh meaning to the idea of "the ghost in the machine," and it does so with an impressive, unusual blend of comedy, drama, and fantasy. The story centers on March (Wisarut Himmarat), a young widower and son of Suman (Apasiri Nitibhon). Suman is the owner of a vacuum cleaner factory; she’s cold, stern, and unyielding, and also a widow herself. You might a…