Fiona Chen is about to start high school. It's a whole different world from primary school. The buildings are bigger, the bullies meaner. But a chance encounter with South Korean exchange student Yuna is about to change everything. Because Yuna knows all about her magic smartphone, and what happened the last time. And Yuna has a special mission for Fiona and her old friends Sunita and Sharlene, plus new buddy Fatima. If Fiona accepts, it will mean going inside her smartphone again.
