Complex sentence: Tired of the Old World, Louis eventually returns to America and New Orleans in the early 20th century, living as a loner; he feeds off any humans that cross his path but lives in the shadows and never creates another companion for himself.
Split into simpler sentences: Tired of the Old World, Louis returns to New Orleans in the early 20th century. Living as a loner, he feeds off any humans who cross his path, but lives in the shadows, never creating another companion for himself.