Sofia (Xuxa Meneghel) is a librarian and book specialist for children. One Saturday night, she's getting ready to go out with her best friend (Heloísa Périssé) when she gets a phone call. On the other side of the line is Matheus (Márcio Garcia), a widower three years ago of a cousin very attached to Sofia, who asks Sofia to take care of her children Julia (Maria Mariana Azevedo) and Lucas (Brunno Abrahão). Sofia agrees on the hour, because besides adoring the children, she is secretly in love with Matheus.