Sab thought, " I cant believe The Big Bad was Shelly all along!"
Soon after Maddie, Ella, Sab and Sadie finally got the courage to go on their second mission and this time they succeeded! In the process of catching The Big Bad Chloe passed away. Selfless Chloe was trying to save Maddie from getting hurt just like an angel would . They were rattled when they found out who The Big Bad was, it was Shelly! Shelly then went to prison.
To conclude Maddie was so so grateful of having her mother back and overjoyed that Shelly could no longer hurt her and her friends and family. They continue to fight crime because that's what Chloe would've wanted. Through all of this Maddie, Ella, Sab, and Sadie all learned that they have to cherish loved ones because you never know when they'll be gone.