Ally Bekkins (one person horse costume) and Jessica Peel and Gena Kelly (two person horse costume) found out about a new supersolvent in a Canadian Lab. They think it might be the solution to escape the horrible costumes they are stuck in.
They sneak in during night, but trigger the high-tech security system which magnetizes the horseshoes of their costumes to the floor.
Characters by Meerkat.
More info about them here: [link]