"The Girl in the Letter" weaves a dual-time narrative between the tragic fate of Ivy Jenkins, a young pregnant woman incarcerated in the bleak St Margaret's home for unmarried mothers in 1956, and Samantha Harper, an ambitious journalist seeking a breakthrough in the present day. When Sam discovers Ivy's fervent pleas for rescue in a series of long-forgotten letters, she is drawn irrevocably into the dark secrets housing within the institution's walls. As the narrative uncovers the murky ties between past injustices and the lives touched by St Margaret's, both Ivy and Sam's stories intertwine to reveal a legacy of sorrow, cover-ups, and a fight for truth that bridges the decades.