Zang and Zark must save the Earth from imminent destruction by the wicked Zorlok. They decide that Jack is the only one who can help, as they mistakenly believe he is Earth's mightiest champion. Meanwhile, Ruby must stop Max and Maisy from stealing Dani's new computer game. When Max and Maisy do manage to sneak past her, the last thing they expect to encounter is real live aliens.

When Dani's gorgeous cousin Marco comes to visit, Dani decides to matchmake him with Ruby. Instead though, Marco and Jack become inseparable. Meanwhile, Max and Ben's attempt to write a love song gets very bad online feedback. They realise they need to get some first-hand experience of love.

Ruby and Maisy are practising for a family reunion, which inevitably leads to them arguing. Maisy decides she would much rather have Dani for an older sister. Dani agrees to let Maisy hang out with her, but then starts regretting what she has done.