Secret Letters is a romantic and mysterious story about two quiet university students, Hardin and Rose. Hardin falls in love with Rose, but before he can tell her, she suddenly disappears. As he searches for her, he discovers a strange portal that leads to another world where time and reality work differently. Together, they explore this dreamlike world, build a life, and face difficult choices about love, time, and destiny. This is a story about deep connection, the power of memory, and never giving up on the person you love.