More bare-faced bravado as Tim and Charlotte and Ginger, skippered by Captain McFee, rush to the lighthouse (in the middle of the night, in a storm) to discover why the light isn't shining and find the keeper and his mate Ernie unconscious. Ernie, recovering briefly, gasps out the explanation--""Wreckers!""--and instructions for switching on the light. Ginger takes off to get help from the coastguard in case the wreckers--who've lighted a decoy to lure ships on the rocks--return, which they do, threatening Tim in vain for the formula to douse the light. But the big liner passes safely and the coastguard comes to the rescue: the ""desperate villains"" are ""foiled again."" As usual, unwavering aplomb and instant competence make Tim and Co. universal heroes, and there's the bonus of an antique lighthouse to look over.