A possible concise summary is:
A couple hires a nanny named Alex to take care of their baby Lana, but they soon discover that Alex is not who she claims to be. Alex is actually a woman who lost her own baby and is planning to kidnap Lana with her husband Mark. She tries to bond with Lana by buying her clothes, calling her Rose, and breastfeeding her. The mother, Reyna, becomes suspicious of Alex and finds out the truth by tracking a GPS bracelet she put on Lana. She confronts Alex and calls the police, who arrest Alex and Mark. Reyna decides to work from home and protect Lana from any other danger.
Here are the key facts extracted from the text:
1. Alex is a nanny who works for Reyna and Walter Smith, who have a nine-month-old daughter named Lana.
2. Alex has been secretly breastfeeding Lana and calling her Rose, which is the name of her own daughter who died prematurely.
3. Alex and her partner Mark plan to kidnap Lana and flee the country with fake passports and identities.
4. Reyna suspects that Alex is not trustworthy and installs a GPS bracelet on Lana to track her location.
5. Reyna and Walter confront Alex at her home and rescue Lana with the help of the police.