When villains disappear for no apparent reason, Clover suspects a shanigan led by the cats of the bad guys. But before she can prove it, she is kidnapped by 3 felines with the appearance of angels ready to do anything to infiltrate WOOHP.

An obsession with knitting revives mammoths to become the queen of hand-knitted sweaters. The spies must act quickly to prevent the arrival of a new ice age, especially because of Alex's overcycling, Clover no longer has a single sweater!