J.R. Ewing returns to town and wants to start a corporation with Sid and patent the engine that Sid invented. Sid refuses his offer and Abby ends up stealing the engine plans and gives them to J.R. J.R. and Abby end up sleeping together. Sid refuses to believe Karen whe she tells him that his sister stole the plans. When Jeff comes to pick up the kids, and packs all of their things into his van, Karen and Val are suspicious.