Here goes...
First about the storyline. If you're familiar with the LoC levels, then you know that some bad guys, The Evil Trio (Doom, Destruction and Darkness) and their leader (Death) casted a curse upon the castle and sealed the coins and trapped the sages (LoC). When the coins were restored, Evil trio retreated, but attacked with an earthquake and caused the world to be in trouble, and recollected the coins, gave them to the Evil Sage, who hid them in the ruines of the world (Ruines).