Just like Phil in "Groundhog Day," Sam keeps reliving the same day over and over again. She experiences all the emotions typically experienced in the human condition and she sees the futility of trying to make a better life by changing something in form. When the ego's purpose is followed, there is no sustained happiness here because this world is a projection of the dark thoughts in the mind.
The value of movies like this is that they raise into awareness the most practical question to ask in regard to anything we do: "What is it for?" With each passing day, Sam starts to question why she and her friends do what they are so habituated to doing. The invitation of the Holy Spirit is to slow down and step back from these meaningless and repetitive interactions and busy doings and see the shining needle in the haystack: the present moment.
In recognition of her important part in God's plan, Sam wakes up one morning in eager anticipation of the new day, eager to make every moment count and not wanting to waste one minute in worry, judgment or idle chatter. She is quick to forgive, ready to extend a smile or hug, open to saying what needs to be said and reminding everyone that they matter to her.
God's purpose for our lives is knocking on our minds each day saying, "I'm here. I love you. I'm the purpose for your day and if you embrace me you will have a wonderful time." Sam opens to and accepts this new purpose. She realizes that by following her heart she calls forth the power to live the perfect day. And as her perception unifies, she excitedly declares, "I'm only watching my greatest hits." All has been forgiven and only her loving memories remain of everything and everyone.