Best friends Mike Allen and Dave Ellacott are on a mission to discover the secrets of one of New Zealand’s most spectacular caves. After a dye-tracer test revealed a connection between the Jr. and Luckie Strike cave systems, the two cavers have been looking for a passageway between the two subterranean worlds. In this short film by Melissa Nickerson, watch these fearless friends avoid stalactites and slide through mud as they explain, “It’s the unknown that makes it exciting.”