Shockwave - this era's commander - has witnessed Galvatron approaching the Decepticon's base, deep beneath the waters off Florida. rather than attempting to talk with Galvatron, Shockwave has responded by sending the Seacons - Snaptrap, Tentakil, Overbite, Nautilator, Seawing and Skalor - into the attack, first in their robot and sea-creature modes, then as the combined form of Pirannacon. Above water however, the Sparkler mini-bots - Sizzle, Fizzle and Guzzle - must face Cindersaur, Sparkstalker and Flamefeather, the deadly Firecons!