seoul mates

Cassidy lost her mother at a young age and just lost her father to a lightning strike. Moving to South Korea with her uncle and his Girlfriend she finds it difficult to keep track of everything, even with her cousin's help. she slowly loses hope until she sees a crevice with a letter in it. Her own personal pen pal. They quickly hit it off and cassie finally sees a light in this horrible tragedy. Who is this person though and how will she find them?