Lou is working hard to organize the Open house for Heartland. She reaches out to Amy and apologizes for the miscommunication, in inadvertently makes Amy think she doesn't believe in her. He comforts her and tells her to enjoy what she has right now. She confesses to him that she feels she's failing at everything at the moment.
When she starts to get upset about Marion she starts to call Tim but stops when Jack enters. Lou receives a call from her boss and continues to postpone her return to New York.
When Lou talks to Amy about a potential client, they start to rub each other up the wrong way when they don't agree on how to move forward.
Amy comes to Lou and is upset that she let Swallow go too early and says Amy told her he was fine. When she says he's fine she takes this to mean he's ready to go so calls the owner to have him picked up. ( Coming Home) Lou asks Amy about the progress of one of her client horses, Swallow. She calls her job in New York to let them know she won't be returning soon. Lou receives a letter from Tim and goes off to meet him to catch up, she warns him that Jack and Amy aren't ready to see him or forgive him yet. She later opens up to Scott about Marion and how she feels about he business. She's informed that they like her business plan but only if she stays to implement it. She goes to the bank to try to organize the re-payment for the loan for the ranch, she gives them a business plan and she's told selling may be a better plan. Lou wants to go back to New York, but keeps herself busy trying to fix Marion's financials with the business. Lou attends her mum's funeral and delivers a speech about the last time she was home and told a story of riding with her and Amy. Jack informs her of the situation and updates her on Amy's condition. She flies straight home to arrive at the hospital. She receives a phone call telling her about the accident with Marion and Amy. We first see Lou in New York busy making deals to her boss. An old friend of Lou's becomes the manager of the diner. After it's declared a heritage site, she purchases it with the help of her father, Tim. Lou fights to have Maggie's Diner turned into a heritage site to keep it from becoming a chain food store. Later the series, Lisa sets Lou up with Peter, an oilman, and eventually, Lou and Peter get married, have their daughter Katie and later officially adopt another daughter, Georgie. Lou also begins dating the ranch veterinarian, Scott Cardinal but they later break up. Carl does deny it but she does not believe him. When her boyfriend from New York comes to visit (Carl), he proposes to her but later she finds out it was only for his job. Dealing with the loss of her mother after she died in a car wreck, Lou moves back to Heartland from New York to help bring the ranch out of financial troubles, as she solves them she does seem to frustrate the others.