Curvature

Curvature-Curvature:2017:Helen tries to deal with the current dying of her husband, a scientist who killed himself proper when he was on the verge of efficiently finishing the invention of a time machine. At some point, she receives a cellphone name, and a voice suspiciously resembling her personal voice warns her that she’s in peril. Is it potential Helen has time travelled? And what may have led her to do one thing like that?