When Rosie and Ben wanted to understand an old cave painting, Grandpa took them back in time in his amazing van. Soon they were in a cold place with mammoths and wolves -and the van was in a hole. How could they get home? And why was there light in the cave?
當Rosie和Ben想要了解一幅古老的洞穴璧畫時,爺爺用他那令人驚嘆的廂型車帶著他們回到過去。很快他們就在一個有猛獁象與狼群的寒冷地方 - 廂型車就在一個洞穴裡。他們該怎麼回家?為什麼洞穴裡有光呢?