Dimensional Detective

In a futuristic cyberpunk world, Ethan is a young engineering technologist running a mechanic workshop while moonlighting as a private detective in the grand city of Techtonia. His life is disrupted by an event of unknown, possibly supernatural, origin in which half the world's population disappears in a flash only to be replaced by mysterious humans not of his time or world. In the chaos that followed, Ethan discovers that his own sister was among the disappeared, prompting him to abandon his old life and embark upon an unexpected dimensional journey that'll take him who knows where to solve the mystery, and to save his sister in the process. Will Ethan find his sister or will something sinister find her?