The TV series "If the Heart Trembles" is a drama about a family who lost their young son. Tatyana and Nikolay were a loving couple and happy parents, but the death of their child turned their lives upside down. They want to adopt a baby from an orphanage to distract themselves from the loss. However, the children that Tanya chooses are always given to other couples. Only little Vanya remains, but at the sight of him, tears flow from the woman: he reminds her of the person responsible for the death of her own son. However, a priest in the church advises her not to chase after ghosts and to take this boy.