After finding the cans of whale oil, Jack investigates Cat Montgomery for her possible involvement in the church arson case. When the evidence points to Cat, Gabe becomes infuriated by the idea of his mother being imprisoned for something she didn't do.
When a group of new male miners comes to Coal Valley, many of the town's women get caught up in the idea of the single men. One of the new miners begins courting Elizabeth and Jack seems to have concerns that resemble jealousy.
Abigail must pay a steep price to complete a top-secret project she's been working on; one of Elizabeth's students has trouble reading so she enlists Jack's help for a creative solution; Abigail gives Jack some fine advice on a woman like Elizabeth.