Nicole Chi Amén, a Costa Rican woman of Chinese descent, has always been on the outside looking in. The opening scene of her moving debut feature replicates this predicament visually: her face pressed against a metal barricade, she looks through a hole in the opaque facade with interest. The camera is observing, too, and the sight of a house being torn down gradually comes into view. This was once the home of her maternal grandmother, a Guangdong native who emigrated to Costa Rica more than 60 years ago. Conceived in…