Season 12 of Heartland sees the Bartlett-Fleming clan dealing with day-to-day challenges and pursuing forgotten dreams. Their strength will be tested as they face personal struggles and must look to one another for guidance and support. The season opens with Amy (Amber Marshall) and Ty (Graham Wardle) trying to balance life with a toddler and their perpetually busy schedules. Realizing their long-time goal of working together turns out to be the solution. But the decision presents inevitable ups and downs that at times threaten their faith in one another. And when a newcomer unexpectedly arrives at Heartland, Amy and Ty are confronted with an impossible choice that could change their family forever. Meanwhile, Georgie (Alisha Newton) enlists a new coach and faces immense pressure to reach the next level, causing her to make challenging sacrifices. In order to support her daughter, Lou (Michelle Morgan) is spurred into making a decision about her expanding business in NYC. But when she discovers an old flame has moved on, she may live to regret her choice. At the same time, Jack (Shaun Johnston) and Lisa (Jessica Steen) confront problems in their relationship when Lisa is faced with a troubling family situation. And as Jack learns to cope with the aftermath of his wife's choices, his resilience is tested further when devastating news is delivered regarding an old friend. In the meantime, Tim (Chris Potter) makes drastic life changes leading to a further rift between him and Jack.