Jake admits Amelia into the hospital after she goes into labor. He then lets his colleagues know that she intends to donate all of her baby's organs. This sparks a debate between everyone regarding the ethical dilemma in play here. There can't be a declaration of brain death in a baby that has no brain. If they wait for the baby to die naturally, the organs will no longer be viable.
Amelia is adamant that she not be given pain medication of any kind. She lets Sheldon know that she's having a "unicorn baby" before kicking him out of her hospital room. In other news, Jake needs Sam's help to harvest the baby's heart and lungs. That's not going to happen anytime soon. Sam doesn't believe in what Amelia is doing. He's also a little ticked about the fact that he caught Jake making out with Addison, who can't convince him to change his mind.
The hospital lawyers may put the kibosh on the transplant procedure, but Charlotte promises to fight them on the issue. Sam explains why he won't do the harvest to Amelia. She understands that what she's asking him to do is unimaginable. But she's asking him anyway because she did some research on all the children that her baby can save. Amelia believes that if she can see good of this, he should be able to as well.
The hospital lawyers say no to the harvesting of organs, but Charlotte says they're going to do it anyway. Amelia is in extreme pain. Addison can't wait on the sidelines any longer. She bursts into the room to support her friend. Amelia lets her know that she's calling her child a unicorn baby. Addy knows exactly what this means. After the baby is born, Amelia asks to hold him. She's not ready to give him up, but heroically finds the strength to allow the transplant team to do their thing. Amelia lets her baby know that his father is waiting for him so he won't be lonely.
The transplant team harvests the baby's organs to send them off to all different parts of the country. Sam is there to do the lungs and heart. Addison later explains to Jake the meaning behind the unicorn baby. When Amelia was 12, she was obsessed with unicorns because they were magical and could do great things. Her baby is doing this now for so many different families. Addison breaks down. Jake takes her in his arms as they finally give in to their passion.
Mason is upset because there was a Mother's Day luncheon at his school. Charlotte wishes there was a way she could take away his pain. Mason lets Charlotte know that he doesn't really know what to call her. He already has a mom. Charlotte assures him that she's not trying to take her place, but she is willing to step in when he needs her. Mason suggests that he call Charlotte "mama" just like she did to her mom. That'll work.
Pete is defiant when he comes before a judge regarding the mercy killing of his patient. He's promptly sent to jail with no bail. Violet wants Pete to start cooperating with his attorney so that he can get out of lockup. Unfortunately, her hubby is one stubborn prisoner. Cooper has a chat with Pete. He tries to convince him that swallowing one's pride is a small price to pay for a chance to be with your family. His words hit home. Violet is thrilled when Pete comes home after cooperating to receive bail.
Sheldon is waiting by Amelia's bed when she wakes up because, well, she's his best friend. The two of them share a nice moment together. Speaking of sharing moments, Sam is waiting for Addison when she arrives home. He lets her know that he should have said he was "all in" with her and Henry. He loves Addison. He wants them all to be a family. That's why he gets down on one knee to ask Addison to marry him. He obviously has no idea that Jake is on his way over with flowers and Chinese food.