What does Ruth 2:3 mean?

So Ruth went out and started gathering grain in a field. By chance, she ended up working in a field that belonged to Boaz, who was from Naomi's husband's family. Ruth 2:3 - Modern Text Bible

(Ruth unknowingly ends up in Boaz's field, which sets up the next part of the story. The 'by chance' detail hints at something bigger at work.)