<p>In an old lighthouse, where a twenty-four-candle lantern lights a sparkling blue-green sea, dwell a solitary keeper and his little companion -- a cat called Mackerel. Together the two climb up, up, up to watch over the nighttime sea and down, down, down to eat and play.</p> <p>On one stormy night, the quick rush of a fierce wind darkens every candle. Soon an errant fishing boat, lost in the raging black sea, signals distress. Sure enough, it is the sudden glow of twenty-four flashing yellow lights that guide the boat away from danger. Just what could those new lights be?</p>