On the morning of his daughter Evie’s third birthday, Callum leaves home to buy her a special doll. When he returns, the music is gone, the cake sits unfinished, and his wife Jess has disappeared. In Evie’s crib, he finds a note: Jess says she can’t stay and tells him to ask his mother about a promise she made. Shocked and confused, Callum takes Evie to confront his mom, only to learn a devastating secret — before their wedding, Jess had a brief affair and wasn’t sure if Evie was biologically his. Afraid the truth would destroy him while he was recovering from a war injury, his mother urged Jess to stay silent and raise the child as his.

Later, Callum finds another letter from Jess explaining her guilt had grown too heavy to carry. She left not because she didn’t love Evie, but because the lie was breaking her. Despite the betrayal and heartbreak, Callum realizes one thing clearly: Evie is his daughter in every way that matters. The next morning, as she innocently asks for her mother and offers to “blow” on his sore prosthetic leg like Jess used to do for her, Callum understands that love isn’t defined by biology but by presence. Though their family is smaller now, he chooses to stay — determined to protect his daughter and rebuild their world together.