歐力的背包居然是通往怪獸世界的通道? 13歲的歐力和他的兩個好朋友克莉奧和柏尼要阻止可怕的怪獸逃走危害世界，但也要保護幫助他們的善良怪獸。
What could possibly go wrong when Ollie's pack turns out to be a powerful portal yto the world of monsters ? Well...it's up to 13 year-old Ollie and his two best friends, Cleo amd Bernnie, to protect the earth from the horrifying monsters that escape - and protect the helpful monsters that assist them!
