萍的祖母去世时留下了十封尘封许(xǔ )久的信，她嘱咐只有在写这些(xiē )信的(de )地(dì )方才能打(dǎ )开它(tā )们。于是萍就带上了祖母的骨灰踏上(shàng )了去往缅甸之旅。她在缅甸遇到了凯凯，只有他知(zhī )晓(xiǎo )祖(zǔ )母的存在。随后他们发现(xiàn )原来(lái )这些信都(dōu )是(shì )一个深爱(ài )着