Your ultimate task is to rescue your sister, who has somehow fallen into an endless sleep. The only way to save her, though, is to find the River King, a big fish that knows what the cure is. As if that's not trippy enough, you also make friends with the magical creatures you encounter on your way to finding the big fella.
A nice feature of the game is its online Wi-Fi, which allows you to have fishing tournaments with friends. The only problem is, though, that you may not know too many people who end up getting the title to make it worth it.
In any case, should you be interested, River King/Harvest Fishing hits Europe in June (and the U.S. this April).
Gallery: River King: Mystic Valley
[Via press release]