Something mysterious is happening at Grandad’s lake. There are days the lake is beautiful, shimmering, and full. And then there are other days . . . where the lake is completely empty! Meara is constantly asking her Grandad why it happens and each time he has a more extravagant and unbelievable reason for her. Meara doesn’t believe any of his stories about mermaids, giants or narwhals, but with a little imagination she may discover the ‘real’ reason…